Great ideea with a lot of potential and really good art overall. My BIGGEST gripe is the fact that you can't use WASD to move and you have to press space to change color. Because of this every time i jump I also press space out of instinct and please implement WASD it's so uncomfortable to hold my right hand in this position. Maybe click instead of space would fix this because i can hold my left hand on the keys. Also maybe use a different key for swapping to each color(j for purple,k for green and l for blue for example) but this would just be my personal preference .