well, that looked like fun, so I took a crack at it...
you only add the Touch object to your project once, and that allows for multi-touch. So, you only need one TouchPoint sprite object to track each active touch.
but you do need a way to tell which side the touch started on, so I also created a PlayArea sprite so that touches would know which player they belong to.
each touch get assigned to the play area they are initially over, and that is used to select the correct energy bar, score instance, etc...
the ball speeds up every time a player hits it. there are variable for how long the game goes for (5 right now), how many paddle instances a player gets before their energy runs out (30), how fast the paddles shrink, how much the ball speeds up, etc...
https://www.rieperts.com/games/forum/touchinput2.capx