more orbs in text

replaced tech, field, and gun text with orbs
  orbs length scale with px->em
cleaned up simulation variables text in pause menu
some minor tech description changes
total tech count no longer includes instant tech or removed tech

tech: planned obsolescence - at the start of each level eject your oldest tech and gain 1.1 damage

heuristics 1.3 -> between 1 and 1.5 fire rate
combinatorial optimization 1.35->1.4 damage

difficulty reduction per level
  0.85->0.87x damage done
  1.23->1.22 damage taken

js/engine.js

@@ -122,7 +122,7 @@ function collisionChecks(event) {
                         }
                         if (tech.isPiezo) m.energy += 20.48;
                         if (tech.isCouplingNoHit && m.coupling > 0) {
-                            m.couplingChange(-4)
+                            m.couplingChange(-3)
 
                             const unit = Vector.rotate({ x: 1, y: 0 }, 6.28 * Math.random())
                             let where = Vector.add(m.pos, Vector.mult(unit, 17))