Was a little tough for me being color blind but overall I really like the idea your going with.

I like the mechanic of using the different coloured masks to phase through the different coloured walls. Another thing I really liked is the simple but affective graphics, they are inviting. One thing though some levels felt really difficult due to the tight collisions.

I like the idea and the game was challenging enough that I enjoyed playing through the levels.
Annoying part was that I felt that I didn't have full control over movement, I felt sometime that I tapped less on the key but ended up colliding fast to the wall

In any ways the game was interesting