Then level 15 first go. Pretty easy in comparison to the previous couple of levels.
Edit: How the f**k did you pass level 16?
Really does look impossible.
It took a while. 17 seems buggy, though. Not sure if it was just me, but there was like an invisible force field.
You need to time level 16 perfectly. You have to go off the ledge at the right speed and rotate so that you miss the spikes on the upper ledge and manage to miss the spikes down the bottom.
It will take a few tries.