Anyone heard of 'Legend of the Five Rings.'
It's a RPG. I't s got a good system, based on Eastern Alchemy.
Which takes five basic elements as the East see them and works off how they could represent the statistics for your chosen character. Be that, Samurai, Ninja, Bushi, Shugenja of either one of the many animal based clans.
I'm not sure if you get be Animal spirits though. There are Rat People, Orges, Goblins & Oni ( Demons.) which non-player monsters. In some ways this is similar to Monkey Magic.
I don't know, maybe if you have enough background information, all of you's together could come up with your own Monkey Magic RPG.