A slight improvement over the quality of castle1.wad (I didn't play castle2 because it's already been reviewed.) The starting actually looks sorta cool, giving you a sense that this map might be better than the previous ones. But, it's only marginally better, with outrageously long hallways as the main annoyance. Combat exists but is still super easy, especially if you use the myriad artifacts in supply. The worst part was getting to the end of a massive hallway and finding out that I needed a green key, which would have been about two minutes of backtracking if I didn't use the turbo cheat. 2/5 would skip
Other than a few competent moments, this is quite passable... as in, pass it by to play a more exciting map. At best it's incredibly easy even on high difficulty levels, with pretty basic and usually ugly architecture, and at worst you get to navigate through a maze of single-linedef walls which of course don't block your shots. If there were anything other than melee golems around, it would have been even more annoying.
No, this is not a 5 star wad, not by a longshot. It is an acceptable time killer though and it's also marred by some teleporter confusion. It's small and the cyberdemon is pretty easy to get rid of, so as name suggests, don't panic.
Some decent gameplay ideas here. The idea of the level itself being an enemy is perhaps most exemplified by the room with the large crusher taking up the most of the middle. In each corner that room is a lantern, and these are solid objects that you have to negotiate while passing through this room, as they force you to move into the zone of the crusher. Early on I got a little careless and was crushed to death. From that point I took the map a little more cautiously.
The experience of the level is marred somewhat by the back-and-forth travelling one has to do to complete it. I get that the point was to keep the player running through the gauntlet of the traps, but some bits of it were tedious in a way that I don't think the author intended. The doors are poorly marked; the yellow key door is just a carved face. Some areas are needlessly cramped, the starting area especially. This isn't to say that there aren't any areas in this level where cramped surroundings do work; there's a room that's full of imps past one of the teleporters that's a fun little skirmish, although you have to be very good at dodging. And I noticed an error in one of the traps: