Very cool puzzle game! The colour sorting mechanic is implemented well and is fun to interact with. The graphics are very charming and clearly communicate any important information to the player. The sound effects are very satisfying to listen to. The music, while a little repetitive, fits the relaxed atmosphere of the game. I also like the character dialogues that show up time to time. I wish there was more gameplay variety, but I wouldn't know how that could be added without changing the entire game.
Very well done!