A mini-episode-worth of maps condensed into one level, full of nice architecture & suprisingly original & meaty arenas in different themes. This is one of those rare maps that allows you to go trigger happy with the rocket launcher for most of the map in a way that doesn't nerf the challenge, a rare joy.
Unlike Mazu I really loved the fiddly brushwork. Such a variety of environments and beautiful intricate shapes everywhere, but never in such a way that clashes with the id1 texture set. The secrets are delightful and the variety of themes is fantastic.
The gold key arena is really nice: the vertiginous height, the sniping points, the triggers… The format is heavily telegraphed in a delicious way. Agree with Mazu that the waves can become dull here: my instinct was to rush up to one of the four corners, at which point you're pretty risk-free for the duration. But eg the dark blue arena, I really enjoyed how long that went on — there's a feeling sooner or later you might run out of ammo or a new configuration will spawn and you'll be whittled down by it. Very neat use of buttons and spawns: it's easy to get sick of those really quick but they were used in volume very judiciously here.
One thing that rankled a bit was the scripted text, after hitting the series of switches in the antechamber to the room in screenshot cin2.png, referring to 'sewage works'. It's IMO always a bit off to have 1 unique flavoured location reference in-game without a body of text referring to others, but especially with the glorious variety of environments in the map, just the one reference to 'sewage' kind of spoils the mystique a bit.
All in all this is seriously impressive work. So many areas had really vivid personal charm, you get a real sense of wonder: combined with the delightful secrets, puzzling, and fresh & meaty combat, this is exceptional stuff. Look forward to seeing more of your work!
And ye, I'm planning to flatten out the cave floor a touch bit more, it is on a list alongside some other relatively minor changes (stuff I noticed post-release but couldn't really change due to having to go on a trip for a few days).