blast mines

tech: blast mines - mines stun when they activate

laser mines only fire if crouching  (so you can fire normal mines when energy is low)
mines now includes the radius of the mob when calculating mobs in range
  so it will detonate from the final boss from farther away
mines have a small random chance to detonate from targets up to 40% father away

time dilation field drains less energy for the first few seconds, but linearly ramps up energy drain as you stay frozen in time
  unfreezing time returns you the normal drain rate in half the time to ramp up
  this should be a buff for all situations, except someone who has a huge external source of energy

360 wave beam has reduced mob slow effect

js/powerup.js

@@ -568,7 +568,7 @@ const powerUps = {
                     // if (powerUps.research.count) text += `<div class="choose-grid-module" onclick="powerUps.research.use('tech')"><div class="grid-title"><div class="circle-grid research"></div> &nbsp; research <span class="research-select">${powerUps.research.count}</span></div></div>`
 
                     if (tech.isExtraGunField) {
-                        if (Math.random() > 0.5) {
+                        if (Math.random() > 0.5 && b.inventory.length < b.guns.length) {
                             //bonus gun in tech menu
                             let choiceGun = powerUps.gun.pick(b.guns)
                             powerUps.gun.choiceLog.push(choiceGun)
@@ -693,8 +693,8 @@ const powerUps = {
         powerUps.research.currentRerollCount = 0
         if (tech.isTechDamage && who.name === "tech") m.damage(0.11)
         if (tech.isMassEnergy) m.energy += 2;
-        if (tech.isMineDrop) {
-            if (tech.isLaserMine) {
+        if (tech.isMineDrop && b.length < 150) {
+            if (tech.isLaserMine && m.crouch) {
                 b.laserMine(who.position)
             } else {
                 b.mine(who.position, { x: 0, y: 0 }, 0, tech.isMineAmmoBack)