Andrew Owen has posted a new video to the ZXodus Engine Facebook page:

He further explained what we are seeing here in a post to the Ultima Dragons Facebook group:

This is 50 levels of Dungeon Crawler Construction Kit, the standalone game I’m spinning off of the ZXodus Engine that I’m using to develop U3.5:PB. The code takes 24K. The levels fit in 1600 bytes.

Impressive!