Hmm, something wrong with the output texture, what video card do you have?
Quadro P500 on a ThinkPad P52S laptop
Quadro Desktop/Quadro Notebook Driver Release 450
Version 452.06
For what it's worth, the retroarch tic-80 core works fine for gameplay, doesn't have this issue. sorry!!
hey sorry to keep posting! i discovered it goes away on fullscreen. it also happened to another game i got on itch.io. it's gotta be something weird on my end, but i'm clueless. thanks for responding and i love tic-80!