The dynamic music sounds epic, and the idea of creating a band really fits the theme of joining together!  I echo everything said below about the defend the stage section- I found the visibility at the top of the screen to be the main sticking point, plus not being able to shoot diagonally makes it hard to catch up with the bats if you're coming from a different direction. But I thought it was fun and enjoyed throwing rocks and rocking out to the track :)

I noticed the dynamic and adaptive music and I loved it! That stuff is so cool and you did it seamlessly really well.

Game is basic, but still fun. The only thing I think is worth mentioning for criticism is the final wave could have used a radar since I couldn't see all four posts at the same time while protecting my bugs.

I don't have any education in music but the balance of the music felt way off. Maybe it's just my headphones but the lower notes were just wayy stronger than everything else, painfully loud even that I had to reduce the volume significantly. Even still they were loud.

All that aside, I absolutely love your game and I'd love to see more. It is my favorite thing when the music track is dynamic, reacting to the player's choices. 

The instruments being layered on top of each other was a brilliant idea. Because the game had very simple and concise "escort" missions, they did not feel like a chore, and added a neat little story element to the game. Once all instruments were collected, I think the game became a little hard and dependent on luck. The problem was that sometimes, no matter what you did, there was no way to stop all the bats that were attacking the orchestra. On my first playthrough, this really bit me hard, and I failed because of it. I understand that its a tall order for a jam game, but the end sequence really needs some sort of smarter bat spawning system to make it feel fair.  
Overall, it was a cute little game, and I liked it :)

Joining together music layers and musicians was was a good idea :) very creative

Everyting was so smooth and fun.  Instead of using arrow keys, targeting with mouse and left click to shoot would be better. Congrats!

This was awesome!!! Layered music is awesome and this game did it really really well and it definitely added to the drama and the anticipation leading up to a performance!! The two stages of gameplay were unexpected and a nice challenge! Gave the game a lot to work towards! Great job and fun game with great music!

I really enjoyed that the music got more complete when you brought in the musicians. The last stage felt a bit unfair as you could barely see where the enemies came from.

It felt really epic though, that it went to a stage segment after getting the friends.

Very fun! also very hard 

The concept of adding to the music on progress is awesome. Adds a lot of motivation and anticipation to the game.

Fun game and I love how the music progressed each time you picked up a band member. I think one thing that could have been better would be to allow the player to shoot in eight directions instead of 4. The way it currently is makes you have to line up with the enemies which feels quite clunky. But overall a fun game!

Really good game but pretty hard.

This is difficult but really addicting, my best was three bugs