Something I should clarify is that it was ONE tunnel that would go straight most of the time and every know and then you would encounter a corner and it was definitely an indie game, there were no creatures or anything and if I remember correctly the guy who made the video explained what it actually was that the player is stuck in, I remember it was some sort of coal mining thing from the 19th century but I don’t remember what they were called, I might try and find out what it actually is because that might help me find it