Spelling Zombie Shooter

Game created for Ludum Dare 41. The theme was "Combine 2 Incompatible Genres", so this is a combination of a spelling "educational" game and a zombie shooter. Good at spelling? Great at killing zombies? Why not flex both skills... simultaneously! Spell words by killing zombies in the right order! Watch out for the other zombies: they might be harmless (for now), but killing them in the wrong order will cost you spelling points.