Here is the safest way to find a high-quality download:

Because Mario Multiverse is a fan project utilizing copyrighted Nintendo intellectual property, it does not have an official storefront presence like Steam or the Epic Games Store. To find a high-quality, safe download of the public demo, you must look to the community's official channels. 1. Official Developer Socials and Discord

Performance tips for higher-quality visuals without huge slowdowns

Since the team doesn’t accept money, you can help by:

The development team frequently pushes patches that optimize performance and patch bugs found in the public demo.

If you encounter bugs, crash reports, or compatibility issues (for example, the demo crashing on Linux through Wine), you can report them in the Discord server or on relevant bug‑tracking platforms.

As of , the project remains in a semi-public/closed beta state. While "public demos" have been released periodically, finding a "high quality" official download can be tricky due to the developers' strict control over the build to prevent low-quality level spam.