It worked fine for me via proton and as the standalone app so far, but it's great to see an appimage too - thank you!
This is really nice - thanks for sharing it!
this is so cute! I love it!
If you didn't already know, there's a homebrew gba game called Lockjaw that has a lot of customisation options for gravity and other rules. I like the visual style and feel of Apotris more personally though.