The core idea of your game was fantastic! Not just that it's a game of "Pong" with as many balls as some player wants to, but also that it's a multiplayer game and that the different colored balls can erase each other! That way it isn't just some "Pong" rip-off, but also a bit of a 'shooting' game. I liked this combination of genres pretty much, that's why I added "Majopon" in our compilation article about the FEMICOM Game Jam #4. For anyone who is undecided if they should play this game, there's also a compilation video which features it. :) Magical stuff!
Best wishes,
Sebastian