Spotco is right about not being able to change lanes in mid-air, currently it is very hard to chain together some pipe-grinds combinations.
The highscore counter worked well enough to get me to drain a lot of time into this game to try to get higher score each time. In the end it got frustrating that I often lost at points where there were either no obstacles or pipes (the transition part) and it felt like there was hardly anything I could do about it. :) But then again I just should have played better at the parts where there were actually pipe-grinds on screen. :D
Very nice entry! :)