No offense, but I don't like the beat 'em up genre (I thought this game was gonna be a metroidvania), so I won't test the game again. That said, I'd imagine you can reproduce the screen limit bug by trying to go past each cat wave, then trying to go back once you hit the right side of the screen, and you'll eventually hit the part I got stuck in. You can also use my score in the screenshot as a guide for where it happened.