i found a glitch. but it doesn't impair or improve your game play really. If you quit right after you beat the first boss, and then play again, the boss will be on the screen at the beginning of the level. the boss doesnt fire any bullets and it doesnt take any damage either. its kinda just a picture of the boss. ohh, and the music that comes on after you beat a boss keeps playing and repeating itself through out the level.
 "New User Tutorial"){kind=icon}
 "Newgrounds Rumble"){kind=icon}
 "ButtonHunt"){kind=icon}
 "Panda: Tactical Sniper 2"){kind=icon}
 "Frantic"){kind=icon}
 "Portal Wars"){kind=icon}