tough platformer with some really cool effects. great work....okay ill go more into detail. I really like the trail you had behind the player as they ran. I also really liked the platforming itself, it was tough but fair, and i genuinely got obsessed with trying to get a higher score for a little while.
The only thing i can think of in terms of feedback and i wont go on about it because others have mentioned it as well and it is really not a big deal, is that there really is only one direction to move in, so allowing the player to go backwards seems a little unnecessary, unless they are trying to be uber precise with their landings. Overall, i really enjoyed this one.