retrocausality

time dilation tech: retrocausality - instead of pausing time your field rewinds time, including your health
  this tech replaces replaces CPT gun
  works well with tech: causality bots and grenades

wormhole
  activated on mouse up
  draw an outline of the wormhole to show if can work at your mouse location

adiabatic healing: adds 5% JUNK in addition to 100% better heals

several tech pool frequencies have been adjusted to roughly this rule:
  no requirements:  1x chance
  requirements: 2x chance
    (most gun and field tech)
  strict requirements: 3x chance or higher

bug fixes

js/simulation.js

@@ -523,6 +523,8 @@ const simulation = {
         // document.getElementById("choose-grid").style.display = "none"
         document.getElementById("choose-grid").style.visibility = "hidden"
         document.getElementById("choose-grid").style.opacity = "0"
+        document.getElementById("choose-background").style.visibility = "hidden"
+        document.getElementById("choose-background").style.opacity = "0"
         document.getElementById("info").style.display = "inline";
         document.getElementById("info").style.opacity = "0";
         document.getElementById("experiment-button").style.display = "inline"