Loved the idea and the music! A few things. 1) the instructions said how the animals moved but not sure if it was a bug but in level 3 the animals moved a bit differently than what was described in the guide. 2) On level 3 when I open the guide the music seems to start over while playing and the viewport acts funny when trying to open and close the guide. 3) For puzzles a hint option would be nice for those of us not picked up on the solution ( I got that alot for my game as well)!
All in all I really enjoyed the puzzles and music! Great job!