Cuphead - Four and Friends in "Back From Beginning" (FULL BOSSFIGHT)
This game (along with the original) are on Scratch. I played them and they were pretty fun. If you would like to play them for yourself, here are the links:
"Back From Beginning" https://scratch.mit.edu/projects/8181...
"Four More Lore" https://scratch.mit.edu/projects/6549...