nicely done
I think it must be more difficult to write a game in Flash than to just make a movie. KUDOS for sticking with it !
A few things, music was a BIT raspy. Maybe something more sepulchral (and less loud).
Enemies kept pouring on the screen. Usually the player must enter "their" area to see enemies and kill them off, then move forward. Maybe have them emerge from the ground a la Ghouls N' Ghosts if you're going to have a non-stop stream of them.
Other than that, nicely done !
A few CONTINUES would be helpful along with a difficulty level setting at the start. :)
David