OH! Hahahaha I get it now… ^^;
I couldnt understand why everyone was saying the background was too quite, because I thought the background was fine and that you were singing way too close to your mic…
Then I went back and listened to it again. This time, I did not turn the instrumental up to the appropriate volume before it got to vocals. Your voice sounded great! But yeah the instrumental was too quiet.
This is a pretty easy fix though. Just go back to the audacity file and increase the gain on the instrumental, and then re-export.
But yeah, really great job! You hit all the crazy ups and downs pretty damn well