Interesting concept, I liked moving the camera separate from the robot. The controls were also clunky enough that it was a game mechanic, that I had to remember and prepare "okay, 3 and then 4 immediately so I go to the right and jump".
I also really love the art, and the 1 bit design of the levels and Professor Electron.
The game is really slow. The destroying machines is really slow, and I have nothing to do while waiting for the robot to finish, except the few times enemies are coming towards me. Often, the enemies took so long to get to me that I only had to kill one, and then the machine was down and I beat the level.
I like the choosing which team first, but I think it would have been better to either make 6 levels that increase in difficulty linearly, and then just color the enemies red or blue depending on what I picked first, or design different kind of challenges to overcome in each world. Starting over on the easy levels when picking the other team added to the slowness.
Overall, good entry!