The game is a really good take on the theme and the graphics are brilliant, took me a few tries before I cleared my first level as I got used to things but after that it was smooth sailing.
You should probably mention somewhere that the colors can actually be mixed and matched to create the shape.
Nothing jumped out at me that needs improvement, its just a really good game that I wouldn't have guessed was made in a week long game jam. You're clearing a very talented person.