thanks for your heartful comment.
I started realize how hard a game can be when there is no visual, both in development and in playing, all the problems about targeting and snake and not get target on the back, they are not intended, I hope to make the experience as smooth as possible but that requires much longer time than I'd expect, and if I want to make a blind or sound heavy game later, I'd definitely consider build to windows, than a web game, as web supports to a lot of plugins is limited.
As for the "get sight back" part, sorry if that makes you uncomfortable. Now I think of it, I can see it can be modified. Maybe change the target to "find the source and solve it so that later people would not suffered from it" . I'm considering if this is a full game, in later games, the characters might realize that they will not get their lost ability back, but they still choose to keep working on the journey, as it would help later people. Let me know if you think this would make you feel better, or you prefer this new target to be delivered at the beginning of the game.
Ultimately, thanks for liking the game, this is very important to me and the team and I really hope one day I'd have a chance to make a full blind game!