diff --git a/src/js/compiler.js b/src/js/compiler.js
index 0561c9a05..ddb973b39 100644
--- a/src/js/compiler.js
+++ b/src/js/compiler.js
@@ -923,7 +923,7 @@ function rulesToArray(state) {
 
     }
 
-    for (i=0;i<rules4.length;i++){
+    for (var i=0;i<rules4.length;i++){
         makeSpawnedObjectsStationary(state,rules4[i],rule.lineNumber);
     }
     state.rules = rules4;
@@ -2789,4 +2789,4 @@ function qualifyURL(url) {
     var a = document.createElement('a');
     a.href = url;
     return a.href;
-}
\ No newline at end of file
+}
diff --git a/src/js/engine.js b/src/js/engine.js
index 0e003fed1..f8e20f4e4 100644
--- a/src/js/engine.js
+++ b/src/js/engine.js
@@ -863,7 +863,7 @@ function applyDiff(diff, level_objects) {
 		if (copy_length===0){
 			break;//tail of buffer is all 0s
 		}
-		for (j=0;j<copy_length;j++){
+		for (var j=0;j<copy_length;j++){
 			level_objects[start_index+j]=diff.dat[index+2+j];
 		}
 		index += 2 + copy_length;
@@ -1081,7 +1081,7 @@ function DoUndo(force,ignoreDuplicates) {
 function getPlayerPositions() {
     var result=[];
     var playerMask = state.playerMask;
-    for (i=0;i<level.n_tiles;i++) {
+    for (var i=0;i<level.n_tiles;i++) {
         level.getCellInto(i,_o11);
         if (playerMask.anyBitsInCommon(_o11)) {
             result.push(i);
@@ -2562,7 +2562,7 @@ function processInput(dir,dontDoWin,dontModify) {
 		}
 
 		
-        bannedGroup = [];
+        level.bannedGroup = [];
         level.commandQueue=[];
         level.commandQueueSourceRules=[];
         var startRuleGroupIndex=0;
@@ -2592,8 +2592,8 @@ function processInput(dir,dontDoWin,dontModify) {
         	
 
 
-        	applyRules(state.rules, state.loopPoint, startRuleGroupIndex, bannedGroup);
-        	var shouldUndo = resolveMovements(level,bannedGroup);
+        	applyRules(state.rules, state.loopPoint, startRuleGroupIndex, level.bannedGroup);
+        	var shouldUndo = resolveMovements(level, level.bannedGroup);
 
         	if (shouldUndo) {
         		rigidloop=true;
diff --git a/src/js/parser.js b/src/js/parser.js
index d760e64c7..6e987304f 100644
--- a/src/js/parser.js
+++ b/src/js/parser.js
@@ -251,6 +251,7 @@ var codeMirrorFn = function() {
             var soundsCopy = [];
             var levelsCopy = [];
             var winConditionsCopy = [];
+            var rulesCopy = [];
 
             for (var i = 0; i < state.legend_synonyms.length; i++) {
               legend_synonymsCopy.push(state.legend_synonyms[i].concat([]));
@@ -270,6 +271,9 @@ var codeMirrorFn = function() {
             for (var i = 0; i < state.winconditions.length; i++) {
               winConditionsCopy.push(state.winconditions[i].concat([]));
             }
+            for (var i = 0; i < state.rules.length; i++) {
+              rulesCopy.push(state.rules[i].concat([]));
+            }
 
             var original_case_namesCopy = Object.assign({},state.original_case_names);
             
@@ -294,7 +298,7 @@ var codeMirrorFn = function() {
 
               sounds: soundsCopy,
 
-              rules: state.rules.concat([]),
+              rules: rulesCopy,
 
               names: state.names.concat([]),
 
@@ -1110,7 +1114,7 @@ var codeMirrorFn = function() {
                         if (sol)
                         {
                             if (stream.match(/[\p{Z}\s]*message\b[\p{Z}\s]*/u, true)) {
-                                state.tokenIndex = 1;//1/2 = message/level
+                                state.tokenIndex = -4;//-4/2 = message/level
                                 var newdat = ['\n', mixedCase.slice(stream.pos).trim(),state.lineNumber];
                                 if (state.levels[state.levels.length - 1].length == 0) {
                                     state.levels.splice(state.levels.length - 1, 0, newdat);
@@ -1120,7 +1124,7 @@ var codeMirrorFn = function() {
                                 return 'MESSAGE_VERB';//a duplicate of the previous section as a legacy thing for #589 
                             } else if (stream.match(/[\p{Z}\s]*message[\p{Z}\s]*/u, true)) {//duplicating previous section because of #589
                                 logWarning("You probably meant to put a space after 'message' innit.  That's ok, I'll still interpret it as a message, but you probably want to put a space there.",state.lineNumber);
-                                state.tokenIndex = 1;//1/2 = message/level
+                                state.tokenIndex = -4;//-4/2 = message/level
                                 var newdat = ['\n', mixedCase.slice(stream.pos).trim(),state.lineNumber];
                                 if (state.levels[state.levels.length - 1].length == 0) {
                                     state.levels.splice(state.levels.length - 1, 0, newdat);
@@ -1158,7 +1162,7 @@ var codeMirrorFn = function() {
                                 }
                             }
                         } else {
-                            if (state.tokenIndex == 1) {
+                            if (state.tokenIndex == -4) {
                                 stream.skipToEnd();
                                	return 'MESSAGE';
                             }