I actually had a lot of fun with this submission!! I really hope you can get it into the official PPJJGG #5 jam page. Regardless, the level design was clever and the gameplay / execution on the theme was really fun to me! Hand painted textures looked really nice too.
I ran on Linux on a 3070 GPU and Ryzen 5800x CPU and didn’t experience any issues with performance (outside of one stutter when the first bullet collided with an enemy). After that it was smooth sailing!