I really like the main idea and the gameplay, having a clumsy robot like this is great. But...
But the heath bar feels so unfair in the beginning. I though of just moving to rating another game a few times. I think you should not punish the player this hard. It would be better if you could repair yourself, while you stand, and would have a lot less hp. This way it would encourage not doing crazy maneuvers, instead rewarding going consistently. (Or you could just remove the hp being more noob friendly.)
The way it is now, the first level teaches you how you can roll on your head to get over obstacles with a loss of hp. But this is not the ideal play-style, and will make the level really hard. At least that's what happened to me. After the third level I got the hang of it, but the first two were painful for me.
That's only my opinion, and even though I wrote this, I liked your game over-all! So it would need a bit of fine tuning but a great game, in my opinion! :)