I've played this game for a decent bit trying to solve it's mysteries. It took me some time but I managed to get through this game. I admit I had to look at your guide to figure out how to get past the fire, and i did die to the opening monster a lot before i figured out how to avoid it. This game was an interesting puzzle and adventure. I am glad that you put so much of yourself into it. To me, it seems that the best art is made when the creator is willing to put some of their heart and soul into the project.
I found this game to be enjoyably hard without seeming to be just fake difficulty. There are time when the answer is far from in front of you, but it is there. You just need to change your expectations about how this game works, and you tell the player that right at the beginning.
After beating the game i set about my goal of unlocking the achievements. To this point I have managed to get all but 4. The ones i am missing are labeled on the NG list as:
Resident: which i think might be more time spent in game
Death addict: which i think might mean i have to die even more, maybe in a specific way
Dweller: Only thin i can think of is maybe more time spent in game
Astral Master: I do not have a clue, possibly get the other achievements
I think my time in this game has come to an end and i might not have the determination to figure these ones out, though i may come back in the future to try again occasionally. Though really i am quite stumped.
I wanted to thank you for bringing people this wonderful and interesting game, and for the great adventure through this world. I tried to help spread word of your indiegogo for Antumbra 2, but I was unable to donate personally. I wish you well on your future endeavors and will be waiting to try them out when you finish them.