It really pains me to write a negative review for this game; it's got tons of style and great ideas, and it's clearly a labor of love for its creators; but as an experiment in how to do a first person graphic adventure, it unfortunately misses more than it hits.
Halfway through I had to start using walkthroughs. A little bit further, I got absolutely stuck even though I knew exactly what I needed to do, and ended up giving up on the game. The game's weird interface causes lots of problems and makes it almost impossible to figure things out at times - even when the underlying puzzle is solid (for example, there is a lovely puzzle involving building a ladder out of tube parts that is renderd too obscure by its execution). There is very little clarity, very little consistency in how interaction works, and it's not helped by very fiddly or clunky sections.
Oh, and there are time-sensitive puzzles and parts where you are attacked by unbeatable monsters.
All of this is a huge shame, because as said before, there is a lot of love and imagination in the game, and when it works, it can be pretty great. It's worth trying and supporting, just be aware of what you're getting into first.