refractory metal

extruder:
  new tech: refractory metal - increase extruder damage radius
  fixed extruder graphics bug, and collisions bug
  dynamical systems and discrete optimization are allowed with plasma torch
    (although I nerfed them both just a bit)

irradiated nails: 90% damage spread over 2s -> 3s
  same total damage, but it takes 1 second longer
toggling harpoon: 6x -> 8x damage
  also the graphic effect is more obvious
slasher mobs will grow their sword at the farthest vertex from the player

js/powerup.js

@@ -217,7 +217,6 @@ const powerUps = {
             simulation.makeTextLog(text);
         } else if (type === "field") {
             m.setField(index)
-            simulation.makeTextLog(`<span class='color-var'>m</span>.setField("<span class='color-text'>${m.fieldUpgrades[m.fieldMode].name}</span>")`);
         } else if (type === "tech") {
             setTimeout(() => {
                 powerUps.lastTechIndex = index