Really fun concept :D I found that it got quite hectic quite quickly, but I think that's the idea :P
Audio design on each of the monkeys' sound was good, which is important in a game like this so props there.
If you're considering continuing the project I think adding a playhead to show what triggers when and being able to duplicate monkeys would be really neat.
Overall, 10/10, would reject modernity and return to monke again.