I played most of your games and I must say like somebody already wrote that it isn't the best of You. I managed to get all the medals, all of them worked for me without any problems (about the one after getting to hell to the ones that did not get it: maybe you rage-quit after seeing the highway being fried and no medal popping up, you've got to click on continue button), but I got some remarks about the gameplay:
1. On the heaven part the movement is maybe even too fast while on the hell part it is a bit too slow (highway has the gravity on it's side after all ;-) );
2. I especially didn't like the heaven part, it looks a bit like a vertical Flappy Bird;
3. Why is it harder to get to hell than to heaven? With all these sins, crimes committed and so guilty conscience they should welcome you with open arms! ;-)