Very cute and well defined game with fitting sounds! I love that the pitch of the jump changes with size, that's a really clever detail!
I wish that there was a limit to the number of clones you can make, since the game isn't really that challenging otherwise. I found myself just bruteforcing my way through the game, which I don't really find that much fun. I see some commenters saying the opposite, so my suggestion would be to give each level a set number of clones the player can make, but don't enforce it, just make it optional, catering to the completionists out there without hurting the experience of the more casual players.
Cool game though, and a great effort for a solo project! Thumbs up!