this game is pretty fun, you can break out of bounds in every level and skip huge parts of the game. i would recommend adding more guns and enemies, and making them possible to dodge.
Bug note, if you press b halfway across the screen, you may get trapped inside a platform, no way as far as i can see to break the softlock. Maybe try having it set you back at the the start when you press b?
I played it on scratch, me and my friends loved it, now I'm downloading the better version here! a tip tho, you should make it twin stick, like enter the gungeon or the binding of isaac.