This was one of the best games I played in this jam. Really cool idea and great implementation! I loved this game from start to finish, and also liked the fact that in the beginning I was scared of the enemy robots, but when I got a grasp of the controls, I started wrecking everything.
A little feedback: I got stuck in the (third?) level, because I did't get the fact that I had to collect all the parts to make the game start spawning enemies, but then eventually got it.
Great job!