my most useless design, which can usefully prevent you from accidentally touching the volume and contrast controls of your gameboy while you are passing that very difficult final boss....and without saving the game...you know, before there was no such thing as saving the game game to repeat if they had killed you, no no no.....and we didn't say "ouch! that's super difficult, it's harder than dark soul" (we didn't say it because dark soul didn't exist yet)...
Wow, I think I've gotten a little lost; Anyway, download it, print it and use it....it's very simple and quick to do.