I like this game very much and the concept is great for some clever puzzles.
The graphics are nice and the music as well. Somne more sound effects for the monkeys would be a nice addition.
In level 5 it was too hard to stop the platform just right, because there was no room for errors and thats frustrating. Even though i understood what to do I just could not make it. I would make that a bit easier.
But after all a really nice game I did enjoy.