I also found out there's a Mario pinball game for the DS I think.
Back to SM128. I just thought of something. If Mario somehow shrinks in the game inside an average house and was able to use a plumbing tool kit or something, there could be levels where he'd have to fix separated pipes so he can continue to the next area, or turn giant knobs to fill up a sink to swim out of it or w/e. Also the use of a plunger would allow Mario to (say if there was a level with shrunken Mario and he's in a bathroom) be able to choose different routes to the goal or completely different levels such as the bathtub (he'd use his plunger to pluck out the cork in the hole and drain himself in it), if he wanted to take the toilet route he'd do that pounding jump on the switch and jump in the swirling water and down the toile, and if he wanted to take the sink route, he'd hop down the drain. There would be more stuff about plumbing and sewers and stuff that makes it very faithful to the Mario Bros. game. Also imagine all the levels outside the house! Mario exits the house through a small crack in the window and runs into an antfarm then there would be an antfarm level with dirt mounds and small hills as platforms and then entering the holes in an antfarm to discover a queen ant and then a boss battle begins. That would be so sick all these levels that I'm thinking of. If Mario was in a sandbox there would be a pseudo desert level with those ball-worms that were in previous Mario games. Tell me some of your ideas and what you think of mine.