I'm glad you could play Matter! Yep, certain levels have some aesthetic issues like depth issues
Btw this Mac issue.. did you have to do something for the game to execute? This issue has been reported often, also I've never tried to play it thru the itch.io app, that's something I could definitely try, and the crash is not about performance, this game is not heavy at all, I think it's due to a permissions issue in Big Sur