This could make for a nice fun time with just moon gravity applied.
But I would not be surprised if there could be more at once. The effects applied can be more than one at a time, the most I have ever been able to count at once is 6. What isn’t simple is how this translates to the game. The full list of effects can be found here.
This ranges from graphics, to gravity, to controls. The base game is unchanged in terms of map design, but a variety of effects are applied at random. At some point a few years ago the content creator Kaze Emanuar came up with the Chaos Edition hack. It turns out that this niche is filled in the form of Super Mario 64 Chaos Edition. What about the people that enjoy banging their head against the wall? With a bit of digging you can find anything from satisfying new stories to meatier challenges for experienced players. ROM hacks are an incredible creative medium for aspiring developers, as well as a content goldmine for players. Some time ago I talked briefly about ROM hacks in a blog talking about emulators.