I'm glad you did release this... it's got some truly fun/funny bits, one of those maps where you really feel like you're having a back-and-forth with the author.
I think the ammo is a bit thin on hard difficulty? I'm not a real ammo-waster (I think) but I had nothing left but a few grenades for the shambler guarding the gold key.
Some of the "gotcha" surprises were a little too gotcha-y, but for a short map like this one it's easy enough to just reload and have another go at a particular part. The scale is too small/cramped in many places as well. But! bottom line, it was an entertaining little playthrough.