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Thanks a lot, you are right. Updating Figur f in Rocket class does work.

On Windows at the top of the window, for mac at the top of the screen bar, select "Scenario > New Java Scenario" or for Windows press CTRL+J

Great I moved getNewButton, I added btn03 = getNewButton (,,,) to addedToWorld and it works

Thanks!

cool thanks danpost it works

For consistency, use frame counting. At normal scenario speed, every 6 frames would be about 1/10 of a second. So, add to score every 6th frame.

<Code Omitted>

@danpost thank you very much for helping me out. It is working now as expected <Code Omitted> I learned that I have to use getWorld() as shown bel

I'm doing the latter

Are you trying to copy the original behavior?

I tried it and still, whether I spawn him right on the ground or make him fall a few pixels, the effect is the same. Let's continue our conversation here, please, if you are still willing to help: https://www.greenfoot.org/topics/64038/0#post_142560

Example: <Code Omitted>

It is "supposed" to make an actor move more precisely; but fails, as accuracy is lost by the roundings.

Alright, thank you that helps to clean up the mess a bit... As a java beginner I thought that at least one instance of a class had to be active at any moment to use the functions in that class, that's why I defined the music in every world separately.