A complete rebuild of my last engine (which is now open-source). Extract after downloading. Go to the "maps" folder to see maps of the two rooms. Main features include support for unlimited num. of floors, doors (some locked), heads-up-display, an awesome death sequence, railings, and realistic physics. Rate and comment!
Now open source, with two builds (0.1.3.8 and 0.1.3.9) included! (I can't remember the difference though..)