Fun
I dont realize why everyone is so very negative on the pay-for levels idea. The 50 good levels kept me intrigued. Since I enjoy platformers I would consider paying maybe 5 dollars or so for another 50 levels. I realize you have to make a living at what you do, and for such clean, flawless gameplay, you are worth it. I do admit, newgrounds is for free games, but this is a leg up from the demos that have been put on newgrounds before. Before, you would get the intro levels to a game, maybe 3, and then be asked to pay 15dollars for the other 100+ levels. So I'll leave it with mixed feelings about the system; you definately did get exposer for it, though.
Pretaining to actual game play: all the controls were fluid and the temp powerup system was awesome. my only complaint is that the arrow had a really small hit test, but this made it more of a difficulty and skill than a bug. Good Job.
P.S. I always love the music you pick for your games.