Very cool concept! I definitely think the control scheme for switching the color could be different, so it's less awkward and easier on your hand, but maybe that's just me. Perhaps using W to jump and spacebar to change color, or just have left mouse button change the color.
I'm sure you know this already, but there are some collision issues, such being able to stand on tiles that are a different color and sometimes falling through correct color tiles.
Other than that, the game was enjoyable! It has a lot of speedrun potential as well, so a leaderboard would be a very nice addition. I hope you keep working on it and add new levels!