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oh my gosh you are right! i feel so silly. thank you so much for your time.

Please provide all of world class codes. Signify where your attempt was made. Then provide the code of the method you are trying to access.

You have two fields that are to hold same value (well, supposed to -- at least). They are (1) the health field that the Player instance retains and (2) the health field that the HealthBar instance retains. To keep things simple, best is to limit yourself to one field per value. So, remove the one the player retains and move all health related code from the Dungeon

Thanks!

Unfortunately it didn`t solve the problem. We uploaded a Version, in which we deleted the GifImage Class, and it shows the same error message.

You need to get a reference to the world to add the object to the world. An actor can receive a reference to the world it is currently in with the ‘getWorld’ method.

I finally found the problem. Thanks.

I suggest that you add a new class. A subclass of Actor called Ground that can be extended to all the objects that your character can stand or bop its head on (Floor1, Platform and Platform2). That way you only need to check for the Ground class instead of checking all three different types separately. Same for the collision offsets -- for each direction, you would only need one check for Ground class).

A class is not an object that can be clicked on. Use a reference to the Play actor that is in your world.

That works. Thanks!

You could save the initial location coordinates and rotation in fields when the actor is added into the world. Then (re)set location and rotation to those values when needed (hits rock).

Yes. You can get the dimensions of a rock before the loop: <Code Omitted>This should put them along