Amazing game
Simple, entertaining, fun but unfortunately also bugged.
I really like this game and I've been playing it non-stop all the way through the end of the bonus chapter. I was a sad little boy when I refreshed this page though and found out I had only received the medals for the first 4 chapters.
I'm not taking any points off because the game is simply amazing and bugs in the medals are no reason to deduct points.
However, one other bug you should take a look at; when I tried to play the game again to see if the medal bug was a temporary problem, I pressed play and the screen turned gray. The game won't play for me anymore (except for map editor; medal still bugged).
I'm sure you're going to fix all of this soon. And besides these issues, I think you've created one of the most entertaining and challenging games yet this year. I just wish I didn't have to play through the last levels again for the medals :P
(seriously, the last chapter and bonus chapter are true tests of patience and anger management!)