What is this? Some kind of Doom mod? It can be summed up as a series of challenge rooms. The better you do, the better the rewards (I suppose). It is a work in progress, but should kill an hour or two when playable, if that.
It is relatively close to being finished, but not quite there yet. It needs a few things, like a sky, some music, and most importantly, a better name. At some point it might need testing as well. Just posting so maybe half a person or two can comment and drive me to finish this in some way.
Oh, from an early version: