I enjoyed the music, and the gameplay wasn't bad, but there were a few problems. First off, the bats' bullets are almost impossible to see. Second, the background is kind of lame, you could have put more work into that. Finally, and I'm not sure if this is intentional, but after you die, candy comes out of the top, as though you've killed a boss. Probably just a glitch.
I can see the bat bullets fine, maybe it's a problem on some monitors or your monitor brightness is too low.
The candy explodes out of your spaceship when you die and you lose the bonus points gained from them candies. Your points total can go down quite a lot when you die in Arcade Mode, so you have to be quick to try to collect as much of the candy you lost. It's not a glitch, it's part of the game.