The song is Shoot the Zombies by Andrew Huang of Songs To Wear Pants To. I didn't write if this song, so all the "you made the chorus too repetitive" comments are pretty pointless.
This is my first flash in a while, and how fitting - what with Halloween approaching. I tried to take a different approach with this one, using only two colours throughout and mixing typography with traditional animation. I hope it worked out for you and that you enjoy it!