A few things to work on;
Maybe a new mic/try to stay at the same distance - you should be able to clench your fist and fit it between your mouth and mic, but that depends on the mic itself to be honest - And I'm guessing you were moving back and forward between the mic, since the sound gets quieter then louder, then quieter again.
Maybe work on your storyline, and spend more time on the animation. I realise you said this was not your best, but you can still learn from it.
I really don't think this should be blammed, but at least if it does, your next should be better from some constructive comments.
xD