My weirdest game is Pause Screen 2 I think, kinda a bizarre epic. Tho if you like glitchy puzzles there's Bone Warper, and Red Mummy if you like atmosphere/story.
I've been seeing lots of people with that bug (none of the curation team had it tho weirdly). It's something to do with how GMS captures the mouse, maybe dual monitor. I'll hopefully fix it for the full release!