Thank you. I'm glad you liked the music since I'm very happy about how it turned out. I know now that the tracking bugs can be a bit difficult. It's not easy getting the difficulty right when you are on a time limit. ;)
I didn't have much time to balance the game so I guess it can be difficult if you don't know where and when the enemies will appear. If you start missing the tracking bugs you're pretty much done for.
A good start for a game. It's a bit hard to see the enemy bullets. Especially the slow ones from the boss. Also the boss has way to much health in my opinion. Other than that, it's great. :)