Hi dude,
I tried seventy two (you said it was the best one and the one you prefered. ;)) and I really liked it. It's a kind of "impossible game". I didn't finish it I went until level 11. I already had more than 90 deaths... :P.
In addition, there are couple of things to improve. For example when the robot jumps, I think you used a "keyboard - on button hold" and you should have used, "on button press" instead. Because, every time I jumped over another platform, If I kept the space bar pushed, the robot will jump and I didn't ask him to jump. Maybe you did it on purpose after all. It's the same thing with the acceleration. I press a little the left or right arrow and the robot slides...It's also cool because it makes the game more difficult. Actually I think you could leave it like that. It's not a bug and it adds more challenge to the game.
To finish, How many levels did you create? Just to see if I was close to the end :)