Quote: "Would it not be better to use keys that are common for all keyboard layouts? Like the arrow keys etc?"
Better yet, make the keys assignable so the end user can have them where they like. EDIT: Perhaps you should put this over in "Feature Creep" as well? Just a thought.
MAME Cab PC: i7 4770@3.4Ghz (passmark 9945), 12GB RAM, Win 8.1/64, GeForce GTX645 (passmark 1898); Shiny new laptop: i7 4800MQ@2.7Ghz (passmark 8586), 16GB RAM, Win 8.1/64, GeForce GTX870M (passmark 3598); Old laptop: i5@2.3Ghz, 8GB RAM, Win 7/64, Intel 3000 graphics