It's not subtle. It's not supposed to be either. The message is clear and it shows a real and serious problem every one who transitions has to face. It's very short but you don't need to know the very life of any of the characters to empathize and see what's wrong. You shouldn't.

Not much of a game, that's why I won't rate it, and more like a visibilization of how difficult this part of the process is using an interesting perspective of the matter and that's not something seen talked much in this media.

And for Christ sake, it's not transphobic at all, it's the opposite. You may not like the execution, the characterization or that it's not exploring deep enough but the message is crystal clear.