First of all: I love the concept. It was really interesting to find such a new approach to Pong! Old classics never die.
If you allow me, I would review the mechanics in a little detail:
The AI is quite strong in the early game. It took me a loooong time to take the first score. Also with two balls there were a lot of shootbacks until I finally made it to the third ball. With the third ball on board, the game get's hot instantly. Now it begins challenging the player, what I really like.
A major improvement would either be:
Speed up the final heat balls (yellow ones) ; Random Up the strength of the AI (reaction time determined by a little random value) ; differentiate the collider sections of the paddle to make variations of shootbacks possible (shoot back in different angles)
But all in all I really enjoyed the game and the concept so far. Great Job! Super inspiring.