Good to hear that helped!
The repeated auto-minimizing is a new one. I haven't come across it before or had any bug reports regarding that, so it might be something unique to your system. Are you running the exe directly or using the itch client?
I did a bit of googling and this looks like a good checklist of possible causes if this is actually a general issue with your setup and multiple games. I'll also let you know if I hear of anyone else having this issue or come up with a solution.