https://www.dropbox.com/s/hmh4ipjqzh48z ... ERHAND.exe
Hold mouse1 to charge a jump/duck under projectiles, release to jump, and tap again at the peak of the jump (when your hitbox is gone) to dive back down.
You can deflect the dark red projectiles when your hitbox appears (the flashing orb around your guy), and your hurtbox is the little red dot appearing on your shoulder.

EDIT: The music was made by this guy, Meauxdal. http://meauxdal.bandcamp.com/album/eternal-draft