The POWER Build / Early B-Roll Build

The POWER Build (also known as early B-Roll and early Alpha) is a build of Super Mario 64 created roughly 2 or 3 months before Shoshinkai 1995. This build is the only publicly shown early build to contain every single level they'd had completed up until that point.

Levels
The levels included in this build are the following:


 * 1) Battlefield [ Bob-Omb Battlefield]
 * 2) Mountain [ Whomp's Fortress]
 * 3) Snow Slider [ Cool Cool Mountain]
 * 4) Water Dungeon [ Jolly Roger Bay]
 * 5) Boo Apparition [ Big Boo's Haunt]
 * 6) Fire Bubble [ Lethal Lava Land]
 * 7) Horror Dungeon [ Hazy Maze Cave]
 * 8) Water Land [ Dire Dire Docks]
 * 9) Desert & Pyramid [ Shifting Sand Land]
 * 10) Castle [Unused Level]
 * 11) Donjon [Unused Level]
 * 12) Numerous Test Levels.
 * 13) Pool Kai [ Wet Dry World]
 * 14) Clock Tower [ Tick Tock Clock]
 * 15) Rainbow Cruise [ Rainbow Ride]

While inaccessible through normal gameplay, every single level they had completed is in the game. This is due to the B-Roll build being built off of the build they considered current at the time. However, many features from the Spaceworld 1995 build are in this build [as it was made as a candidate for the playable build at the show.] The Donjon, and Test Levels were all discovered in the July 25th, 2020 leak, and thanks to that same leak, we found out that the mysterious levels in B-Roll were actually originally used for specific purposes, with the "Unknown Stairs Level" being a test, whilst the others were all earlier revisions.

Water Dungeon
This level is an early revision of Jolly Roger Bay, as shown by the sunken ship. It has two stars and due to the lack of star select, could be collected in any order the player wanted.

The main star of this stage is to swim into a hole in the back of the ship, which contains a hidden room. Opening treasure chests in the right order will spawn a star. The secondary star is a secret cavern through the water, where you would have to defeat all the Goombas.

This level was designed very similarly to final, albeit being much larger and much more crudely modelled. While many elements of this stage were carried over to final, the much larger ship and blue fog were ultimately scrapped. The whole level also had a mysterious sunken building surrounding the ship, which has confused many as there isn't any explanation.

Boo Apparition
This level is an early version of Big Boo's Haunt. It has two stars and due to the lack of star select, could be collected in any order the player wanted. The main star is to get all the Boo Keys to open a secret passage in the library of the mansion, where you'll find the star.

The secondary star is to defeat every Boo in the level, which summons a star in the main lobby.

This level's design is very mazelike, possibly reworked for being too complex to those who tested it. The level is also much more eerie in parts than the final game's Boo level, made only less intimidating by the fact it lacked a unique music track, instead using the Underground arrangement.

Other Oddities
The game had a lot of major differences to Spaceworld in terms of level design, for example. Whomp's Fortress

The level had an absent grassy section on the side, as well as four Bomps instead of three, that were all synced. There was also a fence, and a slightly extended section of wood at the start, that could imply that the start was just wood.