ok, thanks for the feedback! I guess, I should make the cursor behaving similar to Linux then. Probably I change it completely in the future when I don't use WebGL anymore.
Viewing post in Mac feedback and trouble shooting
I just payed for StarbaseSim. I followed the methods described. It is a non-starter.
Neither changing permissions or using terminal worked.
I am using a 2020 MacBook Pro running Ventura 13.0.1 (It is usually stated when an app is too old for the latest systems, but I could not see any such warning before I payed). If you have a new version on the way I will wait a bit, but if not I think I should have my money back.