Nice game but I couldn't play with it. WASD is not usable on a non QWERTY keyboard. :(
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I don't know how you can implement them in the used game engine, but it should work. It seems many developers don't see other keyboard systems (https://fr.wikipedia.org/wiki/Disposition_des_touches_d%27un_clavier_de_saisie) and add only WASD which are really not useable it's even worse when the player can't use his hand “normally”, as has been the case since a minor accident a year ago (my fingers no longer bend properly).
The better thing to do in a "real" game is to give more possibilities and an option to remap the keys to use in the game (what I don't do enough in mines and have to be fixed in next releases).