I think these two songs would do and be great for the movie if there ever was one made. Maybe for the end credits.
Scary Monsters (And Super Creeps) - David Bowie (The 5 min. version)
and
Rabid (Over You) - The Damned (The version that's on the Light At The End Of The Tunnel album)
You Dropped a Bomb on Me by The Band Gap, no question. Especially in the middle where there's no singing and just that high pitched music. Reminds me of Zombies Ate My Neighbors every time I hear it.
You mustn't be afraid to dream a little bigger, darling.
Obviously, for the closing credits, "Zombies Ate My Neighbors" by Single File.
For the opening of the film, they should have the opening song for the game's credits.
For the final boss battle in the film (if ever one), I prefer this rendering of one of the tracks from the game: http://www.youtube.com/watch?v=LIJ8XK_zGBg
But this one's eating my popcorn!