Update MS compat so bugs and walkers still avoid fire (fixes #69) (nice)

js/defs.js

@@ -296,8 +296,8 @@ export const COMPAT_FLAGS = [
     label: "Bonking while sliding doesn't apply instantly",
     rulesets: new Set(['lynx', 'ms']),
 }, {
-    key: 'fire_allows_monsters',
+    key: 'fire_allows_most_monsters',
-    label: "Fire doesn't block monsters",
+    label: "Fire doesn't block monsters, except bugs and walkers",
     rulesets: new Set(['ms']),
 },
 ];

js/tiletypes.js

@@ -781,7 +781,9 @@ const TILE_TYPES = {
             if (other.type.collision_mask & (COLLISION.fireball | COLLISION.yellow_tank | COLLISION.ghost))
                 return false;
             if (other.type.collision_mask & COLLISION.monster_any) {
-                return ! level.compat.fire_allows_monsters;
+                if (level.compat.fire_allows_most_monsters && other.type.name !== 'bug' && other.type.name !== 'walker')
+                    return false;
+                return true;
             }
             return false;
         },