Its a nice and simple game! I like how dying also gives a fisheye lens-like effect, and the camera affects from colliding with or against enemies feels satisfying. The upgrades are a great addition to the game, I also like the art!
I did however run into a situation a few times on the exe and web version where the game slows down (idk the exact cause but i think it happens when killing enemies while dying)
another thing to maybe point out is i think the enemies movements arent normalized (meaning they run way faster when running diagonally) so I often got outrunned by these guys whenever I ran veritcally or horizontally