The bug where the player doesn't move with the platforms still exists in the browser version (I haven't tried the download version yet).
As for feedback, the last level was a bit too riddle-y, a bit too divergent from how the rest of the game is built; I kinda wish you'd just stuck with platforming challenges. Also, on the semi-final level, I got stuck on the right wall of the center platform (all I did was walk off the left side of the right platform), but since walking right to get unstuck results in a fail state, I got sent back two levels. I recommend having a checkpoint after each level instead of sending the player back to the first iteration each time.