diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..2acac6e
Binary files /dev/null and b/.DS_Store differ
diff --git a/index.html b/index.html
index 603e099..37c1715 100644
--- a/index.html
+++ b/index.html
@@ -111,6 +111,17 @@
 					<label for="body-damage" title="allow damage from the ground and large fast moving blocks">collision damage from blocks:</label>
 					<input type="checkbox" id="body-damage" name="body-damage" checked style="width:17px; height:17px;"> -->
 					<br>
+					<label for="classic-select" title="play older versions of n-gon">classic n-gon:</label>
+					<select name="classic-select" id="fps-select" onChange="window.location.href=this.value">
+						<option value="https://codepen.io/lilgreenland/full/ozXNWZ" selected>9-6-2016</option>
+						<option value="https://codepen.io/lilgreenland/full/wzARJY">10-2-2016</option>
+						<option value="classic/7-1-2017/">7-1-2017</option>
+						<option value="classic/1-4-2018/">1-4-2018</option>
+						<option value="classic/7-11-2019/">7-11-2019</option>
+						<option value="classic/9-8-2019/">9-8-2019</option>
+						<option value="classic/3-13-2020/">3-13-2020</option>
+					</select>
+					<br>
 					<label for="fps-select" title="use this to slow the game down">limit frames per second:</label>
 					<select name="fps-select" id="fps-select">
 						<option value="max" selected>no cap</option>
diff --git a/js/bullet.js b/js/bullet.js
index 13af721..47bf92b 100644
--- a/js/bullet.js
+++ b/js/bullet.js
@@ -25,7 +25,6 @@ const b = {
           if (mech.health > 2 * mod.isAmmoFromHealth * mech.maxHealth) {
             mech.damage(mod.isAmmoFromHealth * mech.maxHealth / mech.harmReduction());
             powerUps.spawn(mech.pos.x, mech.pos.y, "ammo");
-            if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "ammo");
           } else {
             game.replaceTextLog = true;
             game.makeTextLog("not enough health for catabolism to produce ammo", 120);
@@ -1545,60 +1544,46 @@ const b = {
       nextFireCycle: 0, //use to remember how longs its been since last fire, used to reset count
       startingHoldCycle: 0,
       fire() {
-        const me = bullet.length;
-        const dir = mech.angle + (Math.random() - 0.5) * ((mech.crouch) ? 0.01 : 0.1);
-        bullet[me] = Bodies.rectangle(mech.pos.x + 23 * Math.cos(mech.angle), mech.pos.y + 23 * Math.sin(mech.angle), 20 * mod.bulletSize * mod.highCaliber, 6 * mod.bulletSize, b.fireAttributes(dir));
-
         //fire delay decreases as you hold fire, down to 3 from 15
-        if (this.nextFireCycle + 1 < mech.cycle) this.startingHoldCycle = mech.cycle //reset if not constantly firing
-        const CD = Math.max(11 - 0.06 * (mech.cycle - this.startingHoldCycle), 2) * mod.highCaliber //CD scales with cycles fire is held down
-        this.nextFireCycle = mech.cycle + CD * b.fireCD //predict next fire cycle if the fire button is held down
-        b.fireProps(CD, mech.crouch ? 38 : 34, dir, me); //cd , speed
-        // b.fireProps(mech.crouch ? 7 : 4, mech.crouch ? 40 : 34, dir, me); //cd , speed
-
-        bullet[me].endCycle = game.cycle + 70;
-        bullet[me].dmg = 0.25;
-        bullet[me].frictionAir = mech.crouch ? 0.001 : 0.003;
-        if (mod.isIceCrystals) {
-          bullet[me].onDmg = function (who) {
-            mobs.statusSlow(who, 30)
-          };
-          mech.energy -= mech.fieldRegen + 0.0075
-          if (mech.energy < 0.02) {
-            mech.fireCDcycle = mech.cycle + 60; // cool down
-          }
+        const pos = {
+          x: mech.pos.x + 23 * Math.cos(mech.angle),
+          y: mech.pos.y + 23 * Math.sin(mech.angle)
         }
-        bullet[me].do = function () {
-          this.force.y += this.mass * 0.0003;
+        if (mod.nailGun) {
+          mech.fireCDcycle = mech.cycle + Math.floor(2.1 * b.fireCD); // cool down
+          const speed = 33 + 10 * Math.random()
+          const angle = mech.angle + (Math.random() - 0.5) * (Math.random() - 0.5) * (mech.crouch ? 0.22 : 0.65)
+          const velocity = {
+            x: speed * Math.cos(angle),
+            y: speed * Math.sin(angle)
+          }
+          b.nail(pos, velocity, 1) //position, velocity, damage
+        } else {
+          if (this.nextFireCycle + 1 < mech.cycle) this.startingHoldCycle = mech.cycle //reset if not constantly firing
+          const CD = Math.max(11 - 0.06 * (mech.cycle - this.startingHoldCycle), 2) //CD scales with cycles fire is held down
+          this.nextFireCycle = mech.cycle + CD * b.fireCD //predict next fire cycle if the fire button is held down
 
+          const me = bullet.length;
+          const dir = mech.angle + (Math.random() - 0.5) * ((mech.crouch) ? 0.01 : 0.1);
+          bullet[me] = Bodies.rectangle(pos.x, pos.y, 20 * mod.bulletSize, 6 * mod.bulletSize, b.fireAttributes(dir));
+          b.fireProps(CD, mech.crouch ? 38 : 34, dir, me); //cd , speed
 
-          // //place in bullet do
-          // //slow  player
-          // const range = 1000
-          // if (Vector.magnitude(Vector.sub(player.position, this.position)) < range) {
-          //   Matter.Body.setVelocity(player, {
-          //     x: player.velocity.x * 0.95,
-          //     y: player.velocity.y * 0.95
-          //   });
-          // }
-          // //aoe damage to mobs
-          // for (let i = 0, len = mob.length; i < len; i++) {
-          //   if (Vector.magnitude(Vector.sub(mob[i].position, this.position)) < range) {
-          //     let dmg = b.dmgScale * 0.023
-          //     if (Matter.Query.ray(map, mob[i].position, this.position).length > 0) dmg *= 0.5 //reduce damage if a wall is in the way
-          //     if (mob[i].shield) dmg *= 5 //x5 to make up for the /5 that shields normally take
-          //     mob[i].damage(dmg);
-          //     mob[i].locatePlayer();
-          //   }
-          // } 
-
-          // //draw it
-          // ctx.beginPath();
-          // ctx.arc(this.position.x, this.position.y, range, 0, 2 * Math.PI);
-          // ctx.fillStyle = `rgba(255,0,0,0.2)`;
-          // ctx.fill();
-
-        };
+          bullet[me].endCycle = game.cycle + 70;
+          bullet[me].dmg = 0.25;
+          bullet[me].frictionAir = mech.crouch ? 0.001 : 0.003;
+          if (mod.isIceCrystals) {
+            bullet[me].onDmg = function (who) {
+              mobs.statusSlow(who, 30)
+            };
+            mech.energy -= mech.fieldRegen + 0.0075
+            if (mech.energy < 0.02) {
+              mech.fireCDcycle = mech.cycle + 60; // cool down
+            }
+          }
+          bullet[me].do = function () {
+            this.force.y += this.mass * 0.0003;
+          };
+        }
       }
     },
     {
diff --git a/js/game.js b/js/game.js
index a579edd..453dc08 100644
--- a/js/game.js
+++ b/js/game.js
@@ -360,17 +360,17 @@ const game = {
     //in testing mode
     if (game.testing) {
       if (keys[192]) { // `
-        powerUps.spawn(game.mouseInGame.x, game.mouseInGame.y, "reroll");
+        powerUps.directSpawn(game.mouseInGame.x, game.mouseInGame.y, "reroll");
       } else if (keys[49]) { // give power ups with 1
-        powerUps.spawn(game.mouseInGame.x, game.mouseInGame.y, "heal");
+        powerUps.directSpawn(game.mouseInGame.x, game.mouseInGame.y, "heal");
       } else if (keys[50]) { // 2
-        powerUps.spawn(game.mouseInGame.x, game.mouseInGame.y, "ammo");
+        powerUps.directSpawn(game.mouseInGame.x, game.mouseInGame.y, "ammo");
       } else if (keys[51]) { // 3
-        powerUps.spawn(game.mouseInGame.x, game.mouseInGame.y, "gun");
+        powerUps.directSpawn(game.mouseInGame.x, game.mouseInGame.y, "gun");
       } else if (keys[52]) { // 4
-        powerUps.spawn(game.mouseInGame.x, game.mouseInGame.y, "field");
+        powerUps.directSpawn(game.mouseInGame.x, game.mouseInGame.y, "field");
       } else if (keys[53]) { // 5
-        powerUps.spawn(game.mouseInGame.x, game.mouseInGame.y, "mod");
+        powerUps.directSpawn(game.mouseInGame.x, game.mouseInGame.y, "mod");
       } else if (keys[54]) { // 6  spawn mob
         const pick = spawn.fullPickList[Math.floor(Math.random() * spawn.fullPickList.length)];
         spawn.allowShields = false;
@@ -399,6 +399,16 @@ const game = {
           x: 0,
           y: 0
         });
+        // move bots to follow player
+        for (let i = 0; i < bullet.length; i++) {
+          if (bullet[i].botType) {
+            Matter.Body.setPosition(bullet[i], player.position);
+            Matter.Body.setVelocity(bullet[i], {
+              x: 0,
+              y: 0
+            });
+          }
+        }
         // game.noCameraScroll()
       } else if (keys[85]) { // next level with U
         level.nextLevel();
diff --git a/js/level.js b/js/level.js
index 2dd6aee..19bd41c 100644
--- a/js/level.js
+++ b/js/level.js
@@ -16,9 +16,9 @@ const level = {
       // game.zoomScale = 1000;
       // game.setZoom();
       // mech.isStealth = true;
-      // b.giveGuns("rail gun")
+      // b.giveGuns("minigun")
       // mech.setField("standing wave harmonics")
-      // mod.giveMod("frame-dragging");
+      // mod.giveMod("nail gun");
 
       level.intro(); //starting level
       // level.testing(); //not in rotation
@@ -59,7 +59,6 @@ const level = {
       const len = Math.floor((mech.maxHealth - mech.health) / 0.5)
       for (let i = 0; i < len; i++) {
         powerUps.spawn(mech.pos.x, mech.pos.y, "heal", false);
-        if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "heal", false);
       }
     }
     if (mod.isGunCycle) {
@@ -138,7 +137,7 @@ const level = {
     // spawn.laserTargetingBoss(1600, -400)
     // spawn.spawner(1600, -500)
     // spawn.sniper(1700, -120, 50)
-    spawn.springer(1400, -120)
+    spawn.starter(1400, -120, 100)
     // spawn.sniper(1800, -120)
     // spawn.sniper(2200, -120)
     // spawn.cellBossCulture(1600, -500)
@@ -3214,8 +3213,8 @@ const level = {
     level.levelsCleared++;
     level.onLevel++; //cycles map to next level
     if (level.onLevel > level.levels.length - 1) level.onLevel = 0;
-
     level.difficultyIncrease(game.difficultyMode) //increase difficulty based on modes
+    if (level.levelsCleared > level.levels.length) level.difficultyIncrease(game.difficultyMode)
     if (game.isEasyMode && level.levelsCleared % 2) level.difficultyDecrease(1);
     game.clearNow = true; //triggers in game.clearMap to remove all physics bodies and setup for new map
   },
diff --git a/js/mob.js b/js/mob.js
index dd94136..d330869 100644
--- a/js/mob.js
+++ b/js/mob.js
@@ -1020,14 +1020,13 @@ const mobs = {
           if (mod.nailsDeathMob) b.targetedNail(this.position, mod.nailsDeathMob)
         } else if (mod.isShieldAmmo && this.shield) {
           let type = "ammo"
-          if (Math.random() < 0.4 || mod.bayesian) {
+          if (Math.random() < 0.4) {
             type = "heal"
           } else if (Math.random() < 0.3 && !mod.isSuperDeterminism) {
             type = "reroll"
           }
           for (let i = 0, len = Math.ceil(2.8 * Math.random()); i < len; i++) {
             powerUps.spawn(this.position.x, this.position.y, type);
-            if (Math.random() < mod.bayesian) powerUps.spawn(this.position.x, this.position.y, type);
           }
         }
       },
diff --git a/js/mods.js b/js/mods.js
index 3c2d790..04e8af2 100644
--- a/js/mods.js
+++ b/js/mods.js
@@ -1011,7 +1011,7 @@ const mod = {
         },
         {
             name: "Bayesian inference",
-            description: "<strong>33%</strong> chance to <strong>duplicate</strong> spawned <strong>power ups</strong><br><strong class='color-g'>ammo</strong> will no longer <strong>spawn</strong> from mobs",
+            description: "<strong>33%</strong> chance to <strong>duplicate</strong> spawned <strong>power ups</strong><br><strong class='color-g'>ammo</strong> will no longer <strong>spawn</strong>",
             maxCount: 1,
             count: 0,
             allowed() {
@@ -1019,10 +1019,10 @@ const mod = {
             },
             requires: "",
             effect: () => {
-                mod.bayesian = 0.33;
+                mod.isBayesian = true
             },
             remove() {
-                mod.bayesian = 0;
+                mod.isBayesian = false
             }
         },
         {
@@ -1081,7 +1081,6 @@ const mod = {
                 mod.isGunCycle = true;
                 for (let i = 0; i < 5; i++) {
                     powerUps.spawn(mech.pos.x, mech.pos.y, "gun");
-                    if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "gun");
                 }
             },
             remove() {
@@ -1200,7 +1199,6 @@ const mod = {
                 mod.isDeterminism = true;
                 for (let i = 0; i < 5; i++) { //if you change the six also change it in Born rule
                     powerUps.spawn(mech.pos.x, mech.pos.y, "mod");
-                    if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "mod");
                 }
             },
             remove() {
@@ -1221,7 +1219,6 @@ const mod = {
                 mod.isSuperDeterminism = true;
                 for (let i = 0; i < 4; i++) { //if you change the six also change it in Born rule
                     powerUps.spawn(mech.pos.x, mech.pos.y, "mod");
-                    if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "mod");
                 }
             },
             remove() {
@@ -1333,7 +1330,6 @@ const mod = {
 
                 for (let i = 0; i < 2; i++) {
                     powerUps.spawn(mech.pos.x, mech.pos.y, "gun");
-                    if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "gun");
                 }
             },
             remove() {}
@@ -1380,7 +1376,7 @@ const mod = {
             count: 0,
             maxCount: 9,
             allowed() {
-                return mod.haveGunCheck("minigun") || mod.haveGunCheck("shotgun") || mod.haveGunCheck("super balls")
+                return (mod.haveGunCheck("minigun") && !mod.nailGun) || mod.haveGunCheck("shotgun") || mod.haveGunCheck("super balls")
             },
             requires: "minigun, shotgun, super balls",
             effect() {
@@ -1391,28 +1387,28 @@ const mod = {
             }
         },
         {
-            name: "high caliber",
-            description: "<strong>100%</strong> increased <strong>minigun</strong> bullet size<br><strong>100%</strong> increased <strong>delay</strong> after firing",
+            name: "nail gun",
+            description: "the <strong>minigun</strong> is modified to fire <strong>nails</strong><br>with a short <strong>fire delay</strong> and a low <strong>precision</strong>",
             maxCount: 1,
             count: 0,
             allowed() {
-                return mod.haveGunCheck("minigun")
+                return mod.haveGunCheck("minigun") && !mod.isIceCrystals
             },
             requires: "minigun",
             effect() {
-                mod.highCaliber = 2
+                mod.nailGun = true
             },
             remove() {
-                mod.highCaliber = 1
+                mod.nailGun = false
             }
         },
         {
             name: "ice crystal nucleation",
-            description: "your <strong>minigun</strong> uses <strong class='color-f'>energy</strong> to condense<br>unlimited <strong class='color-s'>freezing</strong> <strong>bullets</strong> from water vapor",
+            description: "the <strong>minigun</strong> uses <strong class='color-f'>energy</strong> to condense<br>unlimited <strong class='color-s'>freezing</strong> <strong>bullets</strong> from water vapor",
             maxCount: 1,
             count: 0,
             allowed() {
-                return mod.haveGunCheck("minigun")
+                return mod.haveGunCheck("minigun") && !mod.nailGun
             },
             requires: "minigun",
             effect() {
@@ -1847,7 +1843,7 @@ const mod = {
             maxCount: 1,
             count: 0,
             allowed() {
-                return mod.nailBotCount + mod.grenadeFragments + mod.nailsDeathMob / 2 + (mod.haveGunCheck("mine") + mod.isRailNails + mod.isNailShot) * 2 > 1
+                return mod.nailBotCount + mod.grenadeFragments + mod.nailsDeathMob / 2 + (mod.haveGunCheck("mine") + mod.isRailNails + mod.isNailShot + mod.nailGun) * 2 > 1
             },
             requires: "nails",
             effect() {
@@ -2456,7 +2452,6 @@ const mod = {
             effect() {
                 for (let i = 0; i < 6; i++) {
                     powerUps.spawn(mech.pos.x, mech.pos.y, "heal");
-                    if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "heal");
                 }
                 this.count--
             },
@@ -2476,7 +2471,6 @@ const mod = {
             effect() {
                 for (let i = 0; i < 6; i++) {
                     powerUps.spawn(mech.pos.x, mech.pos.y, "ammo");
-                    if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "ammo");
                 }
                 this.count--
             },
@@ -2497,7 +2491,6 @@ const mod = {
             effect() {
                 for (let i = 0; i < 5; i++) {
                     powerUps.spawn(mech.pos.x, mech.pos.y, "reroll");
-                    if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "reroll");
                 }
                 this.count--
             },
@@ -2516,7 +2509,6 @@ const mod = {
             requires: "not superdeterminism",
             effect() {
                 powerUps.spawn(mech.pos.x, mech.pos.y, "gun");
-                if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "gun");
                 this.count--
             },
             remove() {}
@@ -2534,7 +2526,6 @@ const mod = {
             requires: "not superdeterminism",
             effect() {
                 powerUps.spawn(mech.pos.x, mech.pos.y, "field");
-                if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "field");
                 this.count--
             },
             remove() {}
@@ -2558,7 +2549,6 @@ const mod = {
     largerHeals: null,
     squirrelFx: null,
     isCrit: null,
-    bayesian: null,
     isLowHealthDmg: null,
     isFarAwayDmg: null,
     isEntanglement: null,
@@ -2659,5 +2649,7 @@ const mod = {
     isDamageForGuns: null,
     isGunCycle: null,
     isFastFoam: null,
-    isSporeGrowth: null
+    isSporeGrowth: null,
+    isBayesian: null,
+    nailGun: null
 }
\ No newline at end of file
diff --git a/js/player.js b/js/player.js
index 4f57608..fcad15c 100644
--- a/js/player.js
+++ b/js/player.js
@@ -428,7 +428,8 @@ const mech = {
   },
   displayHealth() {
     id = document.getElementById("health");
-    id.style.width = Math.floor(300 * mech.health) + "px";
+    // health display follows a x^1.5 rule to make it seem like the player has lower health, this makes the player feel more excitement
+    id.style.width = Math.floor(300 * Math.pow(mech.health, 1.5)) + "px";
     //css animation blink if health is low
     if (mech.health < 0.3) {
       id.classList.add("low-health");
@@ -500,12 +501,12 @@ const mech = {
       mech.health -= dmg;
       if (mech.health < 0 || isNaN(mech.health)) {
         if (mod.isDeathAvoid && powerUps.reroll.rerolls > 0) { //&& Math.random() < 0.5
+          mech.health = 0.05
           powerUps.reroll.changeRerolls(-1)
           for (let i = 0; i < 4; i++) {
             powerUps.spawn(mech.pos.x, mech.pos.y, "heal", false);
-            if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "heal", false);
           }
-          // if (mech.health < 0.05) mech.health = 0.05
+
           mech.immuneCycle = mech.cycle + 120 //disable this.immuneCycle bonus seconds
           game.makeTextLog(`<span style='font-size:115%;'> <strong>death</strong> avoided<br><strong>1/${powerUps.reroll.rerolls}</strong> <strong class='color-r'>rerolls</strong> consumed</span>`, 420)
           // game.makeTextLog("<span style='font-size:115%;'> <strong>death</strong> avoided<br><strong>1</strong> <strong class='color-r'>reroll</strong> consumed</span>", 420)
diff --git a/js/powerup.js b/js/powerup.js
index f84e247..77fe4fb 100644
--- a/js/powerup.js
+++ b/js/powerup.js
@@ -24,7 +24,6 @@ const powerUps = {
   endDraft() {
     if (mod.manyWorlds && powerUps.reroll.rerolls < 1) {
       powerUps.spawn(mech.pos.x, mech.pos.y, "reroll");
-      if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "reroll");
     }
     document.body.style.cursor = "none";
     document.getElementById("choose-grid").style.display = "none"
@@ -64,18 +63,16 @@ const powerUps = {
               if (Math.random() < 0.37) {
                 mech.fieldCDcycle = mech.cycle + 30;
                 powerUps.spawn(mech.pos.x, mech.pos.y, "reroll");
-                if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "reroll");
               }
             }
           }
         }
       }
       if (mod.isDeathAvoid && document.getElementById("mod-anthropic")) {
-        document.getElementById("mod-anthropic").innerHTML = `(${powerUps.reroll.rerolls})`
+        document.getElementById("mod-anthropic").innerHTML = `-${powerUps.reroll.rerolls}`
       }
       if (mod.renormalization && Math.random() < 0.37 && amount < 0) {
         powerUps.spawn(mech.pos.x, mech.pos.y, "reroll");
-        if (Math.random() < mod.bayesian) powerUps.spawn(mech.pos.x, mech.pos.y, "reroll");
       }
       if (mod.isRerollHaste) {
         if (powerUps.reroll.rerolls === 0) {
@@ -426,52 +423,39 @@ const powerUps = {
   spawnRandomPowerUp(x, y) { //mostly used after mob dies,  doesn't always return a power up
     if ((Math.random() * Math.random() - 0.3 > Math.sqrt(mech.health) && !mod.isEnergyHealth) || Math.random() < 0.035) { //spawn heal chance is higher at low health
       powerUps.spawn(x, y, "heal");
-      if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "heal");
       return;
     }
-    if (Math.random() < 0.15 && b.inventory.length > 0 && !mod.bayesian) {
+    if (Math.random() < 0.15 && b.inventory.length > 0) {
       powerUps.spawn(x, y, "ammo");
-      if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "ammo");
       return;
     }
     if (Math.random() < 0.0015 * (3 - b.inventory.length)) { //a new gun has a low chance for each not acquired gun up to 3
       powerUps.spawn(x, y, "gun");
-      if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "gun");
       return;
     }
     if (Math.random() < 0.0027 * (26 - mod.totalCount)) { //a new mod has a low chance for each not acquired mod up to 15
       powerUps.spawn(x, y, "mod");
-      if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "mod");
       return;
     }
     if (Math.random() < 0.006) {
       powerUps.spawn(x, y, "field");
-      if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "field");
       return;
     }
     // if (Math.random() < 0.01) {
     //   powerUps.spawn(x, y, "reroll");
-    //   if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "reroll");
     //   return;
     // }
   },
   randomPowerUpCounter: 0,
   spawnBossPowerUp(x, y) { //boss spawns field and gun mod upgrades
-    if (game.difficultyMode < 2) { //easy and normal mode
-      powerUps.randomPowerUpCounter += 0.65;
-    } else if (game.difficultyMode === 2) { //hard mode
-      powerUps.randomPowerUpCounter += 1;
-    } else { //why mode
-      powerUps.randomPowerUpCounter += 1.33;
-      if (Math.random() < 0.5) { //why mode gets a free power up chance
-        powerUps.randomPowerUpCounter *= 0.5
-        spawnPowerUps()
-      }
+    powerUps.randomPowerUpCounter++;
+    if (game.difficultyMode === 4 && Math.random() < 0.5) { //why mode gets a free power up chance
+      powerUps.randomPowerUpCounter *= 0.5
+      spawnPowerUps()
     }
 
-    const chance = Math.max(level.levelsCleared, 10) * 0.1 //1 until level 10, then 1.1, 1.2, 1.3, ...
-
-    if (Math.random() * chance < powerUps.randomPowerUpCounter) {
+    const chanceToFail = Math.max(level.levelsCleared, 10) * 0.1 //1 until level 10, then 1.1, 1.2, 1.3, ...
+    if (Math.random() * chanceToFail < powerUps.randomPowerUpCounter) {
       powerUps.randomPowerUpCounter = 0;
       spawnPowerUps()
     } else {
@@ -482,11 +466,7 @@ const powerUps = {
       if (mech.health < 0.65 && !mod.isEnergyHealth) {
         powerUps.spawn(x, y, "heal");
         powerUps.spawn(x, y, "heal");
-        if (Math.random() < mod.bayesian) {
-          powerUps.spawn(x, y, "heal");
-          powerUps.spawn(x, y, "heal");
-        }
-      } else if (!mod.bayesian) {
+      } else {
         powerUps.spawn(x, y, "ammo");
         powerUps.spawn(x, y, "ammo");
       }
@@ -495,21 +475,17 @@ const powerUps = {
     function spawnPowerUps() {
       if (mech.fieldMode === 0) {
         powerUps.spawn(x, y, "field")
-        if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "field")
       } else if (Math.random() < 0.95) {
         powerUps.spawn(x, y, "mod")
-        if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "mod")
       } else {
         powerUps.spawn(x, y, "gun")
-        if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "gun")
       }
     }
   },
   chooseRandomPowerUp(x, y) { //100% chance to drop a random power up    //used in spawn.debris
     if (Math.random() < 0.5) {
       powerUps.spawn(x, y, "heal", false);
-      if (Math.random() < mod.bayesian) powerUps.spawn(x, y, "heal", false);
-    } else if (!mod.bayesian) {
+    } else {
       powerUps.spawn(x, y, "ammo", false);
     }
   },
@@ -517,7 +493,6 @@ const powerUps = {
     if (mob.length && Math.random() < 0.8) { // 80% chance
       const index = Math.floor(Math.random() * mob.length)
       powerUps.spawn(mob[index].position.x, mob[index].position.y, "reroll");
-      if (Math.random() < mod.bayesian) powerUps.spawn(mob[index].position.x, mob[index].position.y, "reroll");
     }
   },
   spawnStartingPowerUps(x, y) { //used for map specific power ups, mostly to give player a starting gun
@@ -547,36 +522,43 @@ const powerUps = {
       powerUps.spawnRandomPowerUp(x, y);
     }
   },
-  spawn(x, y, target, moving = true, mode = null) {
-    if (!(mod.isSuperDeterminism && (target === 'gun' || target === 'field' || target === 'reroll'))) {
-      let index = powerUp.length;
-      target = powerUps[target];
-      size = target.size();
-      powerUp[index] = Matter.Bodies.polygon(x, y, 0, size, {
-        density: 0.001,
-        frictionAir: 0.01,
-        restitution: 0.8,
-        inertia: Infinity, //prevents rotation
-        collisionFilter: {
-          group: 0,
-          category: cat.powerUp,
-          mask: cat.map | cat.powerUp
-        },
-        color: target.color,
-        effect: target.effect,
-        name: target.name,
-        size: size
+  directSpawn(x, y, target, moving = true, mode = null) {
+    let index = powerUp.length;
+    target = powerUps[target];
+    size = target.size();
+    powerUp[index] = Matter.Bodies.polygon(x, y, 0, size, {
+      density: 0.001,
+      frictionAir: 0.01,
+      restitution: 0.8,
+      inertia: Infinity, //prevents rotation
+      collisionFilter: {
+        group: 0,
+        category: cat.powerUp,
+        mask: cat.map | cat.powerUp
+      },
+      color: target.color,
+      effect: target.effect,
+      name: target.name,
+      size: size
+    });
+    if (mode) {
+      powerUp[index].mode = mode
+    }
+    if (moving) {
+      Matter.Body.setVelocity(powerUp[index], {
+        x: (Math.random() - 0.5) * 15,
+        y: Math.random() * -9 - 3
       });
-      if (mode) {
-        powerUp[index].mode = mode
-      }
-      if (moving) {
-        Matter.Body.setVelocity(powerUp[index], {
-          x: (Math.random() - 0.5) * 15,
-          y: Math.random() * -9 - 3
-        });
-      }
-      World.add(engine.world, powerUp[index]); //add to world
+    }
+    World.add(engine.world, powerUp[index]); //add to world
+  },
+  spawn(x, y, target, moving = true, mode = null) {
+    if (
+      !(mod.isSuperDeterminism && (target === 'gun' || target === 'field' || target === 'reroll')) &&
+      !(mod.isBayesian && target === 'ammo')
+    ) {
+      powerUps.directSpawn(x, y, target, moving, mode)
+      if (mod.isBayesian && Math.random() < 0.33) powerUps.directSpawn(x, y, target, moving, mode)
     }
   },
 };
\ No newline at end of file
diff --git a/todo.txt b/todo.txt
index d1686aa..b829eac 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,22 +1,17 @@
-mod: mycelial fragmentation - sporangium release spores as they grow
 
-mod: renormalization 37% chance to spawn reroll when you use a reroll for any reason.
-
-difficulty balancing
-  much more damage done by mobs
-  more effective heals
-  more damage done by player
-  more mod spawns
-
-spring attack mobs take smaller steps
-  this should stop them from "coming in like a wrecking ball"
-
-mob alert range is reduced for large mobs
-  this controls how mobs that see you tell other mobs about your location
+2x difficulty increases after clearing every level once
+mod - minigun fires nails,  nails are inaccurate, but fire rapidly
+added an option to play older versions of n-gon in settings
 
 ************** TODO - n-gon **************
 
-make bayesian inference a part of power up spawn code more directly 
+player goes intangible while immune after getting hit?
+getting stuck above a mob can immobilize player
+  add a minimum knock from player mob collisions?
+
+perfect diamagnetism be able to grab and launch mobs
+
+Gun: Launch yourself at high speed to the enemy, gaining temporary invincibility while in the air and for 3 seconds after landing. Upon impact, trigger a large explosion.
 
 removing supersaturation sets total health to 1
   this cancels the health benefits from crystallized armor
@@ -24,11 +19,7 @@ removing supersaturation sets total health to 1
 
 fix door.isOpen actually meaning isClosed
 
-getting stuck above a mob can immobilize player
-  add a minimum knock from player mob collisions?
-  player goes intangible while immune after getting hit?
-
-the laser fire 3 beams
+mod - laser fires 3 beams
 
 after you die custom should be populated with your last build
 
@@ -37,15 +28,12 @@ considering removing the perfect diamagnetism field from the game
 use canvas pixel array effects for full screen graphics
   add some pixels after player gets hit?
 
-difficulty ramp late game?
-
 give missiles a suck and delay explosion, like vacuum bomb
 
 bot that does AOE damage while it rotates around player
   no physics / collisions
   cap 3 ?
 
-Mod: "Instant Acceleration": Minigun instantly starts firing at max fire rate, skipping the accelerated fire rate stage.
 
 level Boss: fractal Sierpiński triangle
   https://en.wikipedia.org/wiki/Sierpi%C5%84ski_triangle