This map replaces E1M8 - Ziggurat Vertigo in the Saturn version of Quake from Lobotomy Software. The wide open space in the original level would have rendered it nigh unplayable on the Saturn, so the decision was made to make 4 all new bonus levels.
You can infer it form the video, but the sensitivity for the analog stick is set really high by default and isn't changeable. Unless you get used to it, it's quite difficult to aim up/down at enemies and leaving the "auto aim assist" enabled is almost a must.
Not a flawless run by any stretch of the imagination, but I'm just happy that I didn't die.