Good game. I like how it gives great freedom of choice. The less effort you put in completing quests and the less moral you choices the harder the boss is. Great concept.
I managed to unlock all the endings and beat all the boss versions.
Ferryman - a soul carrier to afterlife - cool boss. My favorite version is where he summons fire from sky although the things that you must do to get that ending make it my least favorite ending.
What I found missing is two things, that reduced my score:
1) A save game with a screen that allows player to unlock all the achieved endings and skip to the unlocked boss battles. Boss battles are the most fun things in this game and the hardest are actually the most fun. I would like to replay them but I don't like to run trough the whole island or kill 50 animals each time to get to them.
2) A proper ending explaining what is this place. A dream? Afterlife? Parallel reality? Did the protagonist get back to his home or even escape the island?