i'm on windows! the framerate was sub-30 most of the time. i couldn't screenshot for some reason, they were kinda black static-y scanline-ish lines appearing about 1/5 the way from the bottom of the screen.
thanks for letting me know!
hmm, sub 30 makes me sad. would you mind sending me your specs? you can send them to zachisagardner@gmail.com.
were the scanline things persistent? did they happen in any specific situations or levels? fullscreen windowed? there's a display option where you can switch turn on integer scaling, does changing that fix anything? even if you could send me a picture/video of it with your phone or something of the problem that would be incredibly helpful.
again, thanks so much for letting me know about the problems.