Blood leaked alpha - jcastle1 (full level walkthrough)
jcastle1 is a level cut from the final game that appears in the leaked Blood alpha.
This is a variant of jcast1b. Most of the level is the same, but the room with the axe zombies and large amount of fanatics assaulting the player is instead a room where, when the player gets into the center of it, most of the floor falls down and three corners open, each with a fanatic and an item in them. The way to the upper wall with fanatics on it can be accessed without going into the room the ambush occurs in, unlike jcast1b.
The room that connects the area with a fountain and the first room inside the castle is instead a corridor that connects the fountain and ambush areas. Several enemy ambushes are in this hallway. The hallway is connected to the first room by a crack in the wall that, once blown up, opens a way to the first room from the wall with a monster's portrait on it. The way to the tower secret does not have a switch at the start of it.
The j in the level's name is likely a reference to James Wilson III, who designed several maps in both the prototype and the final game. One of the maps in the prototype with "j" as it's first character has James Wilson III defined as the level's author, meaning this is probably the case.