Well, what a wonderful game.
Honestly, got is a part of indie humble bundle. Thought I'd try it out because was quite bored. And it turned out to be my favourite game of the year as of now.
AS a 2D platformer it is quite demanding on your system - however nothing an average system can't manage (integrated graphics cards tend to have little support and in that regard run the game quite sluggishly. if you've got a separate gpu then it's gonna run smoothly). Nonetheless personally I think it's a beautiful game, even stunning. Mechanics are great - very enjoyable fighting, nice variety of weapons available and they all feel different too (a bit too "soft" and "smooth" for heavy guns like a rocket louncher or so, but it's futuristic plasma rounds that you're firing so I think it reflects on that well). Many different kinds of opponents that you will have to figure out how to kill, so it's not too much of a straight 'shoot em up' platformer.
Where this game really excels is its soundtrack.
The atmosphere it creates is simply... breathtaking. As a part of bundle I received it separately as mp3, and am listening to in on a regular basis - it's that good.
You will quickly notice that this game is not lengthy. Still it leaves plenty of room for prolongued gameplay, especially if you like picking up achievements and accomplishing everything to perfection.
To round up, as mentioned I was so blown away by this game - gameplay, soundtrack and (forgot to mention) story wise. Definetely pick it up if you're a platformer fan (imho it doesn't redefine the genre in any way - however it does show that it's still got that kick), and, well, even if you're not. I guarantee you will not be let down.