1

I need help on unity’s touch interface, I want to ‘do something’ when the user touches the gameobject (a cube), for example : load level 1 when user touches the cube.

Can anyone please help me ? Thank you For your time.

2

This should be fairly simple. Iterate through all the touches, ray cast for each one, and check if you hit anything:

function Update () {
    var tapCount = Input.touchCount;
    for (var i = 0; i < tapCount; i++) {
         var touch = Input.GetTouch(i);
         var hit : RaycastHit;
          if (Physics.Raycast ( Camera.main.ScreenPointToRay(touch.position) ,  out hit ) ) {
                  //Do stuff with the `hit` information
          }
     }
}