It was a really fun platformer, and the character changing while you progress in the game was a really good idea.
Just a thing to add a bit of feedback. The attack buttons are a bit uncomfortable, the Q and E or J and K are better options to play with the WASD in my opinion (I noticed that you can use the mouse but it was when I finished the game haha).
Beware of that, it was a really good game. Great Job!!