Update code means that it will remove the imports of the java.awt.Color and .Font. You have to update the code which is underlined in red then if the code was written differently (like lowercase for colors or constructors which aren't working anymore, especially for fonts).

Isn't your wombat exactly what the ladybug is in this project? The 'addCameraFollower' method is not the method which "moves the screen", it adds the actor which will be followed. Open the 'DemoWorld' and check how it was done.

Well, you could download the game and speed it up yourself. I personally don't think that it is too slow though. I mean you can think about your next move because the ghosts are predictable.

Every single time java got a minor update, I need to find out again how to get the green screen...(Yes, it works in the JS version without doing anything.)