Full disclosure, I'm a friend of Celdur's. :0
I like the idea conceptually. Navigating the map using only a single door is pretty oddball, certainly goes against expectation. Solid and unusual fit for the theme. Certainly worthy of more exploration.
It's pretty barebones but a decent prototype.
For what it's worth I think you guys didn't do too badly at all. I hope this was a worthwhile experience even for those who were only able to participate for a short time. :)