Here is a pong game I made a while back:
If your using the free version of C2 I don't know if you will be able to open it because I think I used 5 layers. If you cant just let me know, and I will try to mod it for you.
This is not the only way to make a pong game but it is the easiest way I could find to with C2.
I didn't comment the event sheet because I'm lazy, and it is pretty small. So if you have any questions about it just ask.
This pong game comes with a AI (Artificial Intelligence). You can adjust the AI speed to make it easier, or harder to play by looking for were it says "lerp(Paddle_AI.Y, Puck.Y,0.05)", and changing the speed "0.05" to a higher or lower number. You can also adjust the ball speed, and acceleration in the layout properties window.
Just look through the events sheet to see how you can set the ball to start at random angles to give your game a more real feel.
I hope this helps.