Creative puzzler with a charming art style! It was a clever take on the "play multiple characters" wildcard!
I think at small scales or from weird angles (e.g. from the back) it's not easy to tell the monkeys apart. Also, the monkeys blocking each other sometimes may work in the games favor where I find it hard to use the other 2 monkeys that can't push blocks.
With a bit of finessing, I think this will be a game with a really cool concept!