#13 hotfix: Added method and changed position to Vector3

frontend/core/src/com/gameware/game/sprites/Sprite.java

@@ -4,7 +4,7 @@ import com.badlogic.gdx.math.Vector2;
 
 public abstract class Sprite {
 
-    private Vector2 position;
+    private Vector3 position;
     private int width;
     private int height;
     private Object bounds;
@@ -14,4 +14,6 @@ public abstract class Sprite {
 
     public abstract void draw();
 
+    public abstract void update();
+
 }
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