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or you could make a new class and use this<Code Omitted>

Okay, use: <Code Omitted>

probs not, but you could try to use a stronger machine or plug in your device

Sorry, habe selber noch nie Sounds in Greenfoot benutzt. Du musst die Klasse GreenfootSound benutzen, nicht Greenfoot: <Code Omitted>

The easiest way is to use the showText method in your world. For example like this: <Code Omitted>

Yes, thanks, this seems to be working! (Although I have still problems getting the scenario to run, probably this one makes problems: <Code Omitted> … but this is another topic …)

Please refer to my Value Display Tutorial scenario.

See comment at end of line 2.

You don't need that class unless you want the timer to be shown on the screen.

Okay. In all your world constructors, you are calling prepare prior to setting the mazeWorld field. It is no wonder the field values in your Actor objects are null.

<Code Omitted>

Actually, you can completely remove the line that was incomplete since you create another object of that type to add to the world in the next line. The "problem" with the act method in general still would need resolved.

You probably have one or more objects that are over top of the button. When weirdness occurs, pause the scenario and right-click on the button to see what type actors are at that location. A possible fix is to add the following line to your world constructor: <Code Omitted>

You cannot use that if the score is in the Snake class. You must get a reference to the Snake object and use it (instead of a reference to the World object). You may want to keep a reference to the Snake object in your World subclass: <Code Omitted>Then you can use: ((MyWorld)getWorld()).snake.score for the score. Also, this way, the score is not lost upon removing the snake from the world.