Hi thanks.
The Mario Brothers tune, is someone else's work, that just happens to work nicely with the SNES, which was a surprise. The others are conversions to work on the SNES, I had to remove a lot of other sounds to get them to even work at all. I consider the other tracks to be mine as they use my own beats and samples for instruments, as the SNES didn't like their originals. 2 player mode is a good idea, but sadly I don't think I could get this working on the SNES, due to the speed of things. This could appear on another console's version or maybe on a Desktop version in the future. I was only just able to get decent speed for the 1 player. I agree that Wario would make a good addition to the game.