I did (nearly) the entire SMB3 OST with my hollow body jazz guitar, and electric bass and stripped down drum kit.
There's very little in terms of liberties taken here, it's really more of a recreation than a cover even. I meticulously recreated every note and every beat, adding only very slight variations for a few transitions and some added accents etc. It's pretty clean and straight forward, really just a celebration of this great soundtrack!
Check it out friends, it's free right now up on Bandcamp: https://michaelzucke...er-mario-bros-3