Interesting idea, I managed to beat the game though I also had a hard time using the attack mechanic and missed a lot of notes. I think it would have been great to start with a basic flute with slower notes and have a way to upgrade it with faster and more powerful notes after you get used to the mechanic. Maybe you could also start the level with objects you have to destroy that don't attack you back. Good job, I hope to see more of this game in future rounds!