Cool platformer, and i like the robot's design with the old rusty look and bright green battery on the back ^^
The jump arc is a bit odd to get used to as you seem to loose a lot of momentum right away, but i think i see why you made it that way, as it does convey the heavyness of the character being a bulky robot.
Other than that i don't have any other issues, i liked the fact that you gradually introduced mechanics such as the dash and switch operated platforms.
Good job to you guys :)