I've got the idea of a pong, it's simple ! but... already seen many times.. so... a solo / rotative one !
And it turns out that it is not simple to make it work properly (mathematically mostly), and from an example it became a minigame ! Behold ... the Circular Pong ! You can make it show geometric information with "g"
"escape" will reinit the game
"left" and "right" will make you accelerate/decelerate
Keep the ball inside the circle as long as you can
![Very Happy :D](./images/smilies/ms-glad.png)
Just one last thing... repeat to yourself "i am calm, i am peaceful" when you playing it
![Razz :P](./images/smilies/ms-razz.png)