Nice ! The only problem is the controls, you can't move and jump with one hand and click colors with the other, so it's not confortable. It would be easy to repair with wasd in the place of arrows keys, or with the up arrow to jump. Anyway, really good game ! cute and all.
(POSSIBLE SPOIL : I wonder if there is a second ending if you change color not the way they are TOLD but the way they are colored... Don't know if you understand what I'm saying... Like, red written in blue, should I press red or blue ? And so different ends ?)