Hello!
Thank you for the bug report!
I checked out the code, and couldn't find any problems on my end -- especially since no one else has ever gotten this bug before! I looked up the bug online and apparently this is a rare bug engine/compiler bug with GameMaker Studio itself, and actually has nothing to do with my game's code, so there's nothing I can myself patch out -- however, there may be ways to remedy this:
-A fresh install of DXC2 might uncorrupt the game file and allow it to be played normally
-Trying to play on a different computer/account may also be a workaround (since nobody else has gotten this bug). I have a key handy if this is the route you want to go!
-If all else fails, I have a pre-release build that I can get to you if you email me at chromatose.akabaka@gmail.com. Whatever weird voodoo jinx is preventing your game from working normally probably isn't in previous builds
Cheers!