this game is a ton of fun but the fact that the song gets about a 1/4 second off towards the end drives me absolutely insane. PLEASE devs, fix this in future releases - it kills the value of the game.
I just got my 1st impossible badge. Here are my times on each level so you know what is reasonable. The only difficult one that required me to retry it a million times was level E. Get good at the first section up through the revolving trap (not the clock thing at first, the second one), then you can be more careful. I only beat it once but that was enough.
A: 13.8, B: 12.7, C: 28.7, D: 4.7 (there is a huge shortcut), E: 67.1, F: 28.3 (another shortcut that is somewhat luck based here when the shifting section butts up against the spinning cut out), G: 19.1, H: 22.1. That total is 196. Good luck!