This is a very fun and creative puzzle-platformer! The pixel art graphics are very nice, and the levels are well put-together.
Some constructive criticism:
-The visual design of each robot should communicate how it controls much more clearly. For example, if a robot jumps higher it could have springy legs, a robot that moves faster could have wheels, etc
-Maneuvering one robot onto a button while keeping another close enough to switch to can be frustrating, due to the small radius allowed for switching. Maybe the levels involving buttons could be designed to let the player carry robots on each other's heads more easily? Or maybe it could be changed so you can switch to any robot as long as there's a direct line of sight between them?
-Arrow keys + Space is an awkward control scheme. A and D to move and Space to jump would probably feel more natural
-The game in general could be a lot snappier. Switching between robots should be much quicker (ideally instantly, or in just a couple of frames) and the robots in general could be a little faster (some of them feel fun to move around as, but others just feel kinda sluggish.) Also, waiting for the animation of the computer lighting up at the beginning of each level slows the pace down a bit. It would be nicer if you could just press enter right away to start each level