Super Mario World Z is one of those weird, unofficial Mario hacks that somehow nails the feel of the original while throwing in some wild curveballs. You start off in a familiar-looking Mushroom Kingdom, but pretty quick you realize things are... off. The level designs twist in ways you don’t expect, and some of the enemies behave just differently enough to keep you on your toes.

It’s still got that classic SMW charm—Yoshi’s there, the cape feather makes a return, and the controls feel just right. But then you hit a level where the physics seem slightly tweaked, or you stumble into a hidden path that definitely wasn’t in the original. It’s a fun little trip if you’ve played the original to death and want something fresh without straying too far from what made the SNES version great.

Just don’t go in expecting a polished Nintendo product—this is a fan-made demo, after all. But for a quick nostalgia hit with some surprises, it’s worth a play.