Great Game
This is one of those few games that really does exactly what it was intended to do. Entertain the player.
There are far too many game developers out there, and on this sight as well, that want to focus on making the graphics as high end as they possibly can. Or they try and invent and entirely new play style and end up making a giant mess out of the whole thing. Graphics aren't a bad thing, by any stretch; but they shouldn't be the most important either.
The graphics for this game fit perfectly for the game that it is. It my not be the most amazing game graphically, but from how smooth the animation is, to the artistic value in it, it blows other games out of the water.
The game play is very simple. It's not weighed down with a thousand different variables and too many commands to keep in order. You run, you jump... simple as that.
While I agree with a lot of other posters that a bit more story would have been nice, I can't fault you for this. This game almost reminds me of a Team Ico project. We're given enough of a story and emphasis on the idea that the character is being chased. He's trying to escape, and is clearly willing to go to any length to do that. But we aren't told what, or why; this allows us to imagine in our own minds why he is fleeing.
One of the best games on Newgrounds by far. Keep up the good work.