Sound design is quite good, though the visuals need some work. The robot-controlling idea seems pretty cool, though there are some tweaks I'd suggest. Color-code which robot is controllable and which isn't, and make it so that you start controlling the robot by pressing a key while on the green platform, rather than just touching the platform. Good start, just needs some more work.

I'd like to see this shifting back and forth mechanic fleshed out. Could be a fun idea.

Well, seeing how bare-boned this is, I don't really have anything to say, other than to just keep workin' on it.