The project is often described as a "Mario Maker killer" due to its sheer scale and customization options:

: Includes themes from Super Mario Bros. , SMB2 (USA) , SMB3 , Super Mario World , Super Mario Land 1 & 2 , and even the New Super Mario Bros. series.

By 2020, "Mario Multiverse" had attracted a team of 12 core developers, 20 playtesters (the "Verification Corps"), and over 50 contributing level designers. The goal? To create a 400-exit, 8-world "multiverse" where every level feels like it belongs to a different timeline.

Mario Multiverse: The Ultimate Fan-Made Experience for Super Mario Fans

★★★★☆ (4.5/5) Deducted half a star because World 5’s water-dimension controls feel slippery even on a gamepad.

This is where new players get confused. The verification is to prevent bots.