Well I liked this story a lot, however it was pretty short, but still really enjoyable and what I looked your mapping skills there are just insanely good, one of the best designing map adventures what I played recently.
Enviroment is just really detailed and you really put effort on those maps and final result is just amazing. 9/10
Scares were good, only couple of those, but enough to scare shitless in some places. 8/10
Story is good and well written, but seems little rushed and in the ending player want more.. what I discovered? It was pretty dull just "Automatic walk here and rock is falling" then BAM end? Hrhm. Don't get me wrong it was nice way to end it, but too quickly imo. 7/10
Puzzles well... there are okay and different way to open some doors, but pretty basic ones and want more challenging ones aswell. For me it was way too easy. 6/10
Overall I can't give you ten out of ten, because there are some flaws, but not big ones just small improvements what comes to puzzles and little more to scare player and improved ending of course. Still it was really nice adventure with rich detailing and amazing map designing what I was looking for in this mod. Well you nailed it!
8.5/10 - One of the best enviroment adventure to explore