That sure was something =P
I also played the Mummy Sandbox demo on the hps1 demo disc 2021 and while it wasn't really my kind of game, I was intrigued by the weirdness of it all and I intend to try more of your stuff. In that one though I did run into a bug the first time I started it where the mouse didn't turn the camera, yet I could still move with WASD like normal. a quick restart fixed that but might be worth looking into the cause.
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!