More bugs I need to fix. This is also sort of a prototype game jam game that I never finished. When you get to the end there is no boss. Does it always get stuck if you start over with a new game?
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.