I think I see the 138 skip. Although for my 137, I skip the 'mystery platform' because it's really long and not too difficult to skip. 137 is as you say a perfect standard run, congrats on 138 :D
2 years late but I can confirm there is 1 skip which I had missed before, but I'm fairly sure everything else is designed to be completed in a particular way so I would say they're just perfect regular runs.
This is still, after so much time, one of the BEST levels of all time. Amazing. And the end part was, even today with all the skill I have gained during the last year, extremely hard.
Rasy why do you think it is boring? Is it to hard (because it was first time i tryed) or do you think there are to less action? Try to make a lvl that shows how you think a fun level is.