Composite replaces World

Matter.World has been replaced with Matter.Composite
  matter.js deprecated World
  could cause problems merging your old code
    (replace World with Composite in your code)

tech: many worlds - now costs 1 research at the start of each level to activate
  a nerf, but also a buff because if you like a build you can freeze it by not getting research

mine gun has 25% less ammo and 33% more damage

railgun now gets 50% more ammo, but it fires slower
fixed rail gun ammo drain on misfire bug

fixed experiment gun display bug

js/lore.js

@@ -305,7 +305,7 @@ const lore = {
                 lore.talkingColor = "#dff"
                 level.isHazardRise = true
                 //remove all bullets, so they can't get endless energy
-                for (let i = 0; i < bullet.length; ++i) Matter.World.remove(engine.world, bullet[i]);
+                for (let i = 0; i < bullet.length; ++i) Matter.Composite.remove(engine.world, bullet[i]);
                 bullet = [];
                 setTimeout(() => { lore.anand.text("I'm actually surprised you haven't been attacked by the adversarial network this time.") }, 500);
             },
@@ -401,7 +401,7 @@ const lore = {
             },
             () => {
                 lore.talkingColor = "#dff";
-                setTimeout(() => { lore.anand.text("hurry back!") }, 1000);
+                setTimeout(() => { lore.anand.text("Hurry back!") }, 1000);
             },
             () => { lore.talkingColor = "#dff" },
         ],