Odd, no one has had that issue from what I know. I'd like to ask a few questions.
Firstly, are you on Windows, Mac, or Linux? And have you tried restarting the game?
There was a flipped character movement bug that took days in the jam to fix, but I don't think it would softlock the game, so I think it's unreleated? Please get back to me if you do relaunch it!