This is the list of common icons I can think right now: pause, rraestt/try again, next (level), highscores, settings, back, home, menu, exit, info, help (?), credits (don't know if that is easy).Then, there is a concept that we (as Gemserk) don't know how to map as an icon, it is the switch language icon, something that anyone from anywhere could say oh, touching that icon will switch languages .