Thanks for the feedback!
I actually wanted this game to be done paper style! The game even still has the debug test function on the F2 key. In the jam version, only a couple textures and enemies have the Paper version. Unfortunately I didn't have time to update the build where almost everything has paper style.
But I'm still very pleased that you liked the pixel graphics!
Self-harm actually came from a bug. I decided to make a weird experiment out of it.
The menu, pause and game over screen should work properly with the mouse. It looks like some bug has appeared. But you're right, I spent much less time on the menu and pause and they are not as polished.