Unused Level 2

Unused Level 2, filename 2TEST.bin, is a removed level in Super Mario 64 that didn't make it into the final game. It is still referred to in the game's debug level select, although is not accessible and does not have a name. With the July 25th 2020 leak, the level was finally brought to light with the stage's model and files. Judging by the name and the level's layout, it's clear that 2TEST.bin was intended to be a test level, specifically for how Mario interacts with certain terrain types, structures and slopes.

Phenomena
This course can appear as a new stage, typically located in the same room as Bob-Omb Battlefield and being access through a red wall on the back wall, being turned into a stage with only one star. The course will have many enemies added to it, and the spawn point will usually be moved to near the bottom of the course. The goal of the course is usually to collect 8 red coins and reach the top, however the red coins part of the course may be removed if the AI believes the player isn't skilled enough yet.