Pretty sympathic shooter, reminds me of a game of tha kind where you are in the same setup but in multiplayer (I don't remember the name). The game is a bit too easy (for once I won't complain), but it's hard to predict where the robots are going to attack, especially since the delay of destruction of the windows is really small. I didn't even see at first glance that there was an upper floor, until a robot came down and attacked me. Apart from that, it's pretty solid, I like it :)