This was a really cool concept and the graphics are highly polished! Great job!
As others have mentioned the ball can move a little slow.
I realize it's a chill game, but you could certainly add timer modes or track how much "yarn" of each colour you used to solve the puzzle to compare against a "par" for each level.
The radomizer settings were really neat. Didn't have time to play with them much but I couldn't figure out how to make a tertiary colour.
Excellent entry!