Great song!Nostalgia~ Really reminds me of super metroid. I really enjoyed the intro but you were right about it being too Low-end Heavy. It drowns out the melody and other instruments. I'm not sure of the problem you are having but maybe just turning down the hum or separating it from the other sounds would make the full peice come out better and give it more dynamics. Other then that, Well done!
~T1LTED