Update Snake

Snake

@@ -52,6 +52,9 @@ void draw() {
   //Boundries, so game ends if touch sides    
   if(x.get(0) < 0 || y.get(0) < 0 || x.get(0) >= w || y.get(0) >= h) gameover = true;
   
+  //Prevents the snake moving over itself, and going backwords
+  for(int i=1;i<x.size();i++) if(x.get(0)==x.get(i)&&y.get(0)==y.get(i)) gameover=true;
+      
   
   //If snake eats apple, add length and randomise apple position    
   if (x.get(0)==applex && y.get(0)==appley) {