A large level, with architecture reminiscent of the author's Alhambra. A bit darker, though... and with more indoor space. The author has suggested a somewhat unique solo method of play-see the readme for an URL with details.
The most complicated (and in some ways, the prettiest) of the Flame Pits levels. Very nice flow, once you get the hang of it... before that, it's easy to toast yourself running out a doorway on the outer ring. Also available in an Evil flavor.
Platforms acting as walls constantly change the shape of the playing field, providing differing paths for getting to your objective. Not much to look at, but can be fun to play.
A central covered arena, with a surrounding lava moat and a second arena above. Judicious use of 5D space to supply a nice quantity of carnage space. Also available in an Evil flavor.
A large open area with 4 lava-filled pits. Switches on the outside edge control the lava height... and the aliens that can nail you. Best as KOTH, but playable as EMfH.
A big level, starting in a really dark room, with access to brighter areas. Some neat tricks, but the flooding one causes some nasty smearing... Also available in an Evil flavor.