Well...
It's certainly not a bad concept for a game. The animations proved that. However, there are a couple things wrong with it.
First off, the jumping. It's fluid. Too fluid. Every time I tried to jump to the sides, I end up going further than I expected, and the had to fight not running into a block or falling off.
Second, the blocks. Every now and then, when I'm pressed up against a block, I'd die. Even during something like attempting to wall jump. I've died in mid-air from being crushed, and there's something wrong with that...
Third, wall jumping. It seems too finicky. There are times when I press J, and the character wall jumps right away, like I expect him to. Other times, I hold down J, and he doesn't do anything. Maybe that was intended, but it seems a little weird to have it like that.
Finally, the music. It's an awesome track, but it does not seem like the original audio file for it was put there. It sounds like someone recorded it from his or her computer using a microphone, and put that in.
Overall, a bit disappointing. It had potential, but the glitches kinda ruin it for me.