Big API refactor

kiln-core/src/scripts/key.rhai

@@ -3,7 +3,7 @@
 // A gem is a grabbable collectible: walking onto it (or pushing it into the
 // player) fires this `grab()` hook instead of blocking. We bump the player's gem
 // count and remove ourselves from the board.
-fn grab() {
+fn grab(me, state) {
     let colors = [
         "red",
         "orange",
@@ -16,7 +16,7 @@ fn grab() {
     ];
 
     for c in colors {
-        if Me.has_tag(`BUILTIN_key_${c}`) {
+        if me.has_tag(`BUILTIN_key_${c}`) {
             set_key(c, true);
         }
     }