I played to level 6 and quit when I found that I had to navigate a narrow passage of lava above and below without a checkpoint right before.

Anyway, I liked the game, but it needs improvements. Bouncing off walls and ceilings like they have springs in them and you're a super-bouncy ball is really annoying. I understand the ceilings to some extent, but having the walls repel you so vigorously--even while on the ground--just seems to make the game needlessly difficult. Another thing, which works to complicate this, is that the ground is always slippery.
Finally, for a criticism of the controls: the keyboard setup was good, but the left and right controls were too sensitive in combination with the slippery ground and bouncy walls. The jump/fly function quickly went from a small hop to a massive upward thrust, which makes a lot of the tighter passageways extremely difficult.

Oh, FYI, there's a glitch at the beginning of level 3 that allows most of the level to be skipped by walking through the wall.

It's a good start. I was able to run beyond the screen, resulting in the game eventually stopping. Having to constantly stop running in a run game to make sure that you're at a comfortable difficulty or to keep from going off the screen is pretty annoying. It would make sense to give a fixed running motion and allow the player to move left and right, or--should you choose to keep it with the player having full control of the running--allow the player to run to the left as well instead of waiting for the screen to catch up. Another alternative is to have a fixed running point and left/right controls the speed at which the game runs.

Yaaaaaaay, Nihilism! :D
Not much of a game exactly, but I like it.

I actually like this, but it's painful to listen to (especially with headphones). I think the low end--particularly the bass drum--is very loud (probably intentional given that it's dance music). The synth effect of swelling and abruptly cutting off might be exacerbating it.

Definitely felt that swinging you mentioned.

This is pretty good, especially considering you aren't a metalhead. As a bassist, I greatly appreciate having the bass audible, but in this case, it's too loud in the mix. Typically, you'll want the loudest part to be the melody or the part of greatest interest at a given moment in a piece--and a simple, repetitive bass line is neither of those. Having it as the loudest part in the beginning, however, was a good choice; just bring everything up to its level.

Compositionally, it would be nice to have more development of the theme, variations, a separate thematic idea, and possibly a breakdown (this is metal, after all).

Unfortunately, I can't really point you toward anyone in this particular style of metal since I typically listen to more technical and melodic bands like Blotted Science, Anata, Obscura, and Death (all can be found on youtube).

I look forward to hearing the final product!

Pretty awesome, dude

You might want to consider more than just bass and drums backing up the solo guitar though...it sounded kinda empty. Good job overall.