Thoughts while listening:
Hmm...certainly better than most 8-bit videogame tunes I hear tossed out here on NG. Sounds like you've put some real effort in. Really simple lead-line, but it works well. Certainly a good videogame track. Could be used in pretty much any genre of game! Really long silence at the end. Perhaps you need to trim...
Thoughts after listening:
-Considering this is a videogame track, it would be really handy to make it a loop, rather than a complete song. Just a thought.
-Could use a bridge, to mix things up. Once you've heard the first minute, you've kinda heard the whole song.
Some good things;
-I still loved the atmosphere...could be used just about anywhere. I mean, I can't really think of a genre of game that this couldn't work for! Maybe Animal Crossing might not be the best place, but other than that...
-Well mixed! Your levels are top-notch, and there was no ear-grindage anywhere.
-I loved the simplicity of the lead-line. Many people seem to make a good rhythm section, then completely miss putting in a lead, mostly because they can't really compose, I suspect. You, however, took three notes and a rhythm and made it work. Mad props!
Overall, solid track. Simple, effective, and universal. Could use a little mix-up, but considering that you're trying to create a steady drive for a boss fight, that's not entirely a bad thing!