Hi! Bought the game as part of the Racial Justice bundle, and after playing through some initial confusion (about things like the landscape being different for each clone) it suddenly all fell into place, and I reached the Prism Vault after lots of fun.
The game has now crashed for me twice in the Vault after a lot of fighting and running, and I'm pretty sure it was in exactly the same spot taking exactly the same action. Made it to the third big section of the Vault, after the arrival room and the big chamber with the shielded Beacon in the center --- so I'm turning some prisms, turning drainage back on, all that. I find my way down to the lower levels, and sort of at the "southwest" of that part of the map there's a prism next to a prism vault (I think). When I turn that prism the first time and the beam redirects "north," the game crashes to desktop. Fortunately, when I restart, I'm back at the beginning of the Prism Vault. If I'm doing something wrong or there's an obvious workaround, please let me know; otherwise, consider this a crash report or whatever you call that sort of thing. Thanks for a really fun action game --- I love how chaotic it is to make a "build."