Good use of the Kenny 1-bit art. I love that art pack!
Overall a solid game, swapping weapons feels fun as they all have some sort of use to them. I was always hunting for the new weapons.
The one thing I did notice was the menus don't completely cover the screen. With some like the game over menu it looks intentional but the main menu it looks off.
If you wanted to improve I suggest adding a countdown when the weapon switches to give the player a bit more planning time.
Overall good game!