I have went throught version 1.3 and have the following comments:
The Number of the Beast
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×1S: An OK room. I can kill the serpent without letting it out of the track it is in.
1S1E: It looks really nice. It is possible to clear the tar and trapdoors
without stepping on any of the south facing force arrows.
2S1E: I can kill the serpent without opening the doors on either side of it.
3S1E: All the wraithwings can be killed near the entrance.
3S2E: The mimic is not needed.
Black Rose Immortal
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×1W: The first group of six evil eyes were a good start, but the rest were just a bunch of hack and slash. A checkpoint under each tar mother would probably be a good idea.
1S1W: A tedious room.
1S: Mildly entertaining room.
2S1E: The serpents can be killed without striking any orbs, except the one which lets to to the other side.
1S1E: Another tedious room.
1E: I can kill the tar mother before she spawns.
Raining Blood
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×Ent: Once I pick up the mimic, I can clear all the roaches without leaving the
small room the potion is in.
1S1W: The covered tar maze is not fun at all, especially without any checkpoints in it.
1S: Nothing special.
1S2W: One of the better rooms, but it is possible to shorten the serpent before going in, and subsequently kill it without hitting the orb first.
1S1E: Currently not solvable, there is no way to get to the fourth serpent.
2S1E: Nothing special, just hack and slash brained roaches.
3S1E: The east half is OK, but there is no way to the serpent and brain on the west side.
Welcome Home (Sanitarium)
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×Ent: The current state of the trapdoors makes it unclearable.
1N: The evil eyes are OK, but the trapdoors are very tedious and boring.
1N1E: Not fun at all. Clearing the room was just holding down the battle key for the most part.
1E: The roaches were just hack and slash, but I do not see a way of killing the serpent.
2N1E: Another tar covered maze. This one was not as bad as the first.
Through the Fire and Flames
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×1N: A bit tedious, but I can kill all the roach queens without any roaches spawning.
2N: Currently impossible. The eastern of the two red doors needs to be removed or replaced with a green door.