good looking sprites and good animations! It was lacking a little bit in game feel as you say. f.ex. the characters felt a bit floaty. You could add different amount of screen shake for each character. f.ex. the cyborg is heavy so it could shake a little bit more than the caveman to sell the effect that the cyborg can jump shorter. It also lacks a bit of sound f.ex. jumping/landing sound, with those sound that game would feel a bit better. In total it’s a well made game within a week!