Frustrated
Great game but a few things:
I get actionscript errors when jumping in tight spaces. Happened quite a lot on the level "fill r up". You can't load your progress because of some actionscript error. I also encountered a LOT of unidentified actionscript errors during the game. It's quite a buggy game. Testing is as important in the creative process as making the game.
The spike proximity is randomly unforgiving. It seems all you have to do is land within the atmosphere of the spikes to be shredded. Other times you can pretty much land on the spikes and you don't get hit.
I played all the way to the perfectionist medal. What a fucking waste of time. Fix the medals. You have no idea how frustrating it is to spend so long playing the game, then to be told it was for nothing.
Loved the ending.