I'm digging this. I decided to make it longer. Here is gameplay with some new environment and weapons. It's all randomly generated.
Basically i plan more than one play modes - one will be campaign, with more custom missions, second will be arcade with randomly generated levels (like this one), and last will be free play, when new robots will be spawning and attacking player, until he dies.
Here is video on youtube:http://www.youtube.com/watch?v=i1v10da5k5Q