Cool little game!
I like the twist you puy on the classic pong game! But I feel like the dice mechanic that increase the points scored works only if each goal is scored quickly, otherwise all the goals will add 6 points, no matter the number of bounces of the dice. And there are also exploits that the other comments have already pointed out.
The powerups are fun, but maybe a bit too rare. And the paddle sometimes feels very slow.
It's great that you added both 2 player mode and player vs AI!
Good job :)