Oh man, that character looks amazing! It feels really good to jump around and it's an interesting mechanic.
I think part of the issue in understanding the game is your choice of the word 'behind'. I interpreted that as above or to the side of robot and once there, was only attacking by clicking in the same position over and over. 'Through', 'past' or even 'over' could be much clearer. That alone may help to explain it without a video.
Even after working that out and playing in easy mode many times, it was still quite difficult and I didn't get far once the robots started shooting.