This is a great little game, I really appreciated the mechanics and the esthetics. The game could easily be expanded to a full game, and the option allowing to select the two colors is a nice little addition.
The only drawbacks I see are the controls and the difficulty of the puzzles. Having to use the mouse to interact is not the best method in my opinion, have 'e' or any other key could be better. Regarding the difficulty, the puzzle are quite straight forward, you can't really fail them.
But don't worry, I am sure these issues are time related, and this game surely is high quality for a game jam. Congrats! :)