Here is my cover of the Oedo stage from Mystical Ninja (or the first Ganbare Goemon game in Japan) on the SNES. I thought it came out fairly good, but I made it a while ago before I knew much about effects, so I ended up with too many instruments and too little effects...
EDIT: Also, tell me if I got something wrong, because as usual, I did it by ear. It should be quite close though, because since it was in SPC format, I could listen to each individual track.