This is delightful, what an amazing concept. I don't know any musical theory so it seems like magic to me that you had it sounding good throughout the whole game. I love playing around with groupings to hear what it sounded like.
At a certain point the clicker was redundant - I didn't want to hear my clicking instead of the music :) At the end it would have been nice to be able to turn off the generation and just play with my whole orchestra without introducing more animals.Maybe add a "concert mode" or something for fun? :)
The art and the the concepts for the animal musicians/instruments is lovely. I think my favorite design is the turkey. The whole game is very well laid out and easy to understand as well.
Thank you for the experience :)