Mallet Mania doesn't work well due to newer Flash incompatibilities. about ruffle

[Dinnerbone]

ruffle_core::avm2::events: Error dispatching event EventObject(EventObject { type: "enterFrame", class: flash.events::Event, ptr: 0x215f51adb40 }) to handler FunctionObject(FunctionObject { ptr: 0x215f520d6c0, name: Ok("com.nitrome.game::MenuSystem/enterFrame()") }) : TypeError: Error #1009: Cannot access a property or method of a null object reference. (accessing field: addChildAt)
	at MethodInfo-1130()
	at com.nitrome.game::MenuSystem/enterFrame()

menuSystem.onOutroComplete = function():*
{
    var _loc1_:Sprite = null;
    (root as MovieClip).gotoAndStop("game");
    _loc1_ = new Sprite();
    (root as MovieClip).addChildAt(_loc1_,1);
    (root as MovieClip).controller = new Controller(stage,_loc1_);
    (root as MovieClip).controller.startGame(players,number);
    (root as MovieClip).stop();
};

Likely an issue with goto frame ordering/execution