Its a nice platformer, i liked the robot design and the levels were nice.
Some easy improvements that could be made would be:
Split the robot and the wind key, so as to animate the wind key when you wind up the robot without moving the wheels (maybe you can split "Wind key", "Robot Body" and "Robot wheels" to make the robot move up and down when you are winding it up)
Instead of Using raycast to check for ground, use Physics2D.OverlapCircle(). that way, you can give a bit of coyote time to the player (Be careful, you have to set the walls to a diferent layer than the ground, or the player will be able to jump from them and be spiderman)
Allow the player to jump while moving
on the 3rd level (the one with falling blocks), open a hole in the wall, because i didnt know i had to go trough there
And (this one might be more difficult), Use rigidbody.AddForces()/.velocity instead of checking if there is and obstacle up and changing the robot transform to make your robot jump and not teleport.
Overall, nice Game