Nice one!
This is a very well-done remix. Brings back such memories - avoiding all the kamikaze enemies, gliding to that lone island with the purple gem, and getting my @$$ handed to me by the doctor himself. I've always thought that the best video game remixes are ones that invoke memories of playing the game.
A couple of things I would change: the percussion in some parts (I'm not sure which drum you used) was almost like a slap in the face. I might make it less prominent. The tempo was a tad slow.
What really sells this is the parts with the lovely, robust sounds of the low piano, when that comes in. Anyway, keep up the good work!