I just replayed it, and I managed to get stuck in a wall on the last level. For the bug to happen, when you spawn in, just walk left, and when you hit the wall, you'll clip into it and can't get back out.
Great to see you playing again! oh wow, there definitely is something funky happening with the walls, strange. It was fine when I made them but i guess i must've changed something at some point and they broke. weird. Thanks for testing and notifying me!