Amazing game! Very fun, I like the way that you have to work out what everything does. I don't know what the score means when you win (mine was 2669) and working out how to make yellow was quite challenging (the dark bluish color was easier, but I didn't have to use it?).
The only thing I disliked was having to click on an empty tile to show the 'shop' menu, other than that a fun experience.
I might make something similar as I like the concept.
9/10 game. Great work.