Flicking marbles game

Hi,
I am new to iOS development and especially to touch control. I would like to make simple ​​flicking marbles game.
I looked at the documentation on TouchPhase, but I'm not sure how to do it.
Thanks for any advice.

 

Here's some touch phase code I used. I only had to determine if the swipe went left, right, up, or down. You'll have to sort out the precise direction of the swipe, but this should give you a head start.

Code (csharp):

1.  
2.         foreach (Touch touch in Input.touches)
3.         {
4.             if (touch.phase == TouchPhase.Began)
5.             {
6.                 if (_paused == false)
7.                 {
8.                     downpoint = Input.mousePosition;
9.                 }
10.             }
11.  
12.             if (touch.phase == TouchPhase.Ended)
13.             {
14.                 if (_paused == false)
15.                 {
16.                     uppoint = Input.mousePosition;
17.                 }
18.             }
19.         }
20.