I'm glad you enjoyed the game! I also loved watching your speedrun and I'm flattered that you have put effort into getting good at the game!
you have made some pretty impressive discoveries that I didn't think people would make on their own! For example, in Metropolis City you figured out that it is better to do the shortcut even if you don't have turbos!
and about the framerate, many android users reported the same problem ):
I've been optimizing the game and it should run much more smoothly after the next update (which should come out in the next few days, or maybe even today!). Hopefully this will improve your experience with the game (: