played through this once so far, and it took me over 3 minutes =( spectacular job here guys! just one little niggle, towards the end, on the the bottommost path just after the 2nd hang glider section, there is a fall-away platform. if you miss the jump, it's quite difficult to make the extra distance. so much so that i though it was physically impossible, and back tracked for a a while to try and find another route around, which i didn't, so i hammered at it a bit more until i got it pixel perfect. while probably moreso my sucktacular skills, it did break the flow a bit. i would suggest either making the fall-away floor respawn off screen like in other games, or close the gap a tiny bit to make the jump a little easier. keep up the good work!
EDIT: i think it was act 2