Pro Mario World Demo One is one of those weird, obscure SNES romhacks that feels like stumbling into an alternate universe where Mario got a little... experimental. The level design's got that classic Super Mario World vibe, but with some odd twists—like random enemy placements that'll catch you off guard if you're used to the original.

First few minutes in, you'll notice the physics feel just slightly off—Mario slides a bit more than he should, and the jumps don’t always land how you expect. Not necessarily bad, just different. Some of the power-ups are swapped out too, so don’t be surprised if you grab a feather and get something totally unexpected.

It’s definitely a curiosity for die-hard SMW fans, but don’t go in expecting polished Nintendo magic. More like a "what if someone remixed this in their basement in 1995?" kind of experience. If you're into weird retro hacks, it's a fun little time capsule.