Ok, thanks for checking the translation. The "ON", "OFF", and "GAME OVER" don't need to be translated -- they're recognizable enough as they are. As for the "HIGH SCORE", I thought it was recognizable as well but now that I'm thinking about it, I'd better translate it. The "JETPACK" string can't be translated, because there's no word for it in Greek, as far as I know. The only untranslated instances of "TUNNEL" appear in strings "TUNNEL1" and "TUNNEL2" and I didn't know I needed to translate them, I thought they didn't appear in game, they seemed like debug/developer strings at the time. The "TOUCH BUTTONS OFFSET", I was planning to translate it after I was done with most of the strings but I forgot; to be honest I'm not even sure what it means. As of the shopkeepers' name, I actually intended to ask you about it. In Greek, the word order would need to be inversed, that is the shop name would come first and then the shopkeeper's name, but I wasn't sure if the game would allow me to do that. For those strings to be rendered correctly, you'd need to print something like this in Greek: WELCOME TO THE [ NAME OF SHOP] OF THE [SHOPKEEPER'S NAME], which I don't know if it is possible to do. So I left those strings in English.
Also, since you mentioned the other diacritic symbols, would you like me to draw them as well?