// Use this for initialization void Start() { // Register a listener for any key to start the game anyKeyListener = InputEvent.AddListenerAnyKey(PushStart, null); // "game" related: Make the sphere wait to be woken (click, touch or key) sphere.GetComponent <Rigidbody>().Sleep(); // create a bouncy physics material PhysicMaterial pm = new PhysicMaterial("Bouncy"); pm.bounceCombine = PhysicMaterialCombine.Maximum; pm.bounciness = 0.8f; pm.staticFriction = 0.4f; pm.dynamicFriction = 0.4f; sphere.GetComponent <Collider>().material = pm; }