Why did my game just break itself?

I was working on a project of mine and all of a something seems to be wrong. I didn't change anything related to the issue, but for some reason it just changed out of nowhere. Are there any bugs or something I should know about?

Heres the project. Half of the moves no longer work.

The game seems to think you're falling, which disables most of your moves. What I cant figure out is why. And when I change the falling variable to (false) manually, it doesn't fix anything. It just takes away my falling moves too.

did you happen to press undo?

No. And even if I did, I made way to many moves to undo my way all the way back there.

Ok, I figured it out. Some weird variable stuff