I just read that this game will be updated by the end of March! They are adding boss battles, new combos moves, different zombies, etc. I didn't even know this was a Zombie game until I purchased it. This was free when I picked it up, now it costs $1. I'm guessing the price will go up a bit when they update it. There is a lite version if you want to try it out first. As of now the game is basically a side-scrolling game with two weapons; a gun and a huge blade. The gun can be upgraded to things like a flame thrower. I'm looking forward to the update because I think the graphics in this game are great and I love side-scrollers.