More an exercise in 3-d artwork than a game. Just someone's bedroom with a HK in a tiny lobby outside the door, and a Caco in a tiny yard outside the window. A BFG and Invisibilty Sphere are also in the yard but you can't get out there. I think the name is a clue - maybe this was the start of a bigger level, then abandoned. He ought to have allowed it as a base for development.
Starts with all monsters with their backs to you, and you might as well leave it that way and just listen to the music. One big rectangular room with no finish switch. They couldn't even make the rectangle properly - freehand I guess. Kill the monsters if you want, it's easy.
Superb firework display of thousands of fireballs seeming in slow motion because of the vastness - mostly avoidable as they land where you were ages ago; but worth playing just to see it. A HUGE square surrounded by tiers with hundreds of imps and a few others, plus a blockhouse you can enter first to collect ammo. Fighting through the hundreds of monsters when you get onto the tiers is another matter, overwhelming at UV. I cheated to finish so at least I could review. Some HOM bugs.