Simple and fun for about 20 mins (Not much replayability, 10 levels are quite quick to complete). It's quite cool how the zombies actually get sliced into bits. Though I'm not sure what the point of there being 2 different weapons (single laser and triple shotgun like Lazer, the shotgun one just seems superior in every way, idk).
My only sort of complaint is the fact that once a bunch of zombie parts start accumulating in one place, they eat up your laser shots, I think. Which is somewhat annoying. Other than that, its good.