After trying it with my actual pc, selecting parts finally worked.
The characters drawings are all a bit odd, uncanny, and I don't know if it was intentional, but it really adds to the atmosphere of the game, it always feels like something is worng with them, you're always scared of pressing the green button. Sometimes is really hard to tell if they're human, good job, nice game.
Also I admit that the first time I fell for the first boss in the intro lol