Expansive cave area with some lava and chasms. You run through arenas much like those "classic" shooters like nu-Shadow Warior, Painkiller or Hard Reset. Ugly room design with next to no lighting variation. Monsters spawn in hordes by scripts but the fights are usually very easy due to circle-strafing. Poor level.
The map is a pleasant, detailed and HUGE structure. On the other hand it is too labyrinthine and the fight are not engaging.
Things I hated: two little buttons (too difficult to find) and the mice (they don't blend well in the futuristic/nightmarish setting of Doom).
Things I loved: vehicles/aircraft and the wide variety of textures.
P.S. For a first map this is absolutely stunning. My compliments...