I now added a scaled up version. Don't know if that breaks any rules doing that afterwards, but I haven't changed the game itself, so it should be ok, I guess. It's the first game I've (fully) published, my very first game-jam and also the first time dealing with restricted resolution in unity, so please have mercy.. ^^' Didn't think it would be that hard, since in-editor everything worked perfectly fine, with the custom resolution. Only when building it made problems...