I take my previous comment back.
This game is kinda nice (4-/5) till the second part of the game.
After its 3 with --, at most. It's baggy as fuck, the corruption/purity options doesn't even appear, instead the game shows you both with heavily breaks the momentum, and the characters CONSTANTLY remember scenes and decisions, including dialogs, that were NOT in the game.
And moreover I couldn't complete the game, because after one of the MAIN mermaid quests the game decided, that I've seen enough content and didn't even allow me to take the second MAIN quest.