there's a ton of mini adjustments that should've been made. i'm in a small team, making a game, and according to the programmers on the team the hitboxes were very poorly defined, there are issues with permanence of projectiles on the screen if you pause, and a ton of mobs that get fucked up if you do a specific sequence of movements. And since they've made the game on Unity, it's kinda upsetting that there are so many issues, Unity has one of the easiest methods of defining hitboxes ever. I feel like the artists worked a LOT more than the programmers on Cuphead's team. They could've spent more time bugfixing and testing while the animators drew a thousand frames for each boss xD