There are several control schemes to play around with and there are 66 levels or so to go thru. Once you get used to the control scheme, it's a heck of a lot of fun. I'll post a review up later, but for now, it's well worth the $5 just for the nostalgia factor and being able to kill mecha hitler again. It amazes me that games that used to take up so much space on a PC, now run on a fucking cell phone. Technology is great.