To make the superslide script work also for mobile in addition to the left & right arrow key add this snippet:
$("#slideshow").on("touchstart", function(event){
var xClick = event.originalEvent.touches[0].pageX;
$(this).one("touchmove", function(event){
var xMove = event.originalEvent.touches[0].pageX;
if( Math.floor(xClick - xMove) > 5 ){
$(this).superslides('animate', 'next');
}
else if( Math.floor(xClick - xMove) < -5 ){
$(this).superslides('animate', 'prev');
}
});
$("#slideshow").on("touchend", function(){
$(this).off("touchmove");
});
});