Really nice game, it reminds me a bit of Tasty Planet (I don't know if that was an inspiration or not). Also I really liked the song you used, its very chill. Only thing is it only played once, maybe you could get it to loop?
Another suggestion I have is to maybe have some items you're supposed to clean (like dust bunnies, crumbs etc) and others you aren't suppose to clean (like toys). I feel that would add a lot more challenge to the game, because right now its just be patient and try to cover the whole screen. Having to avoid certain items would require a lot more skill.