At first glance, I wasn't really sure what the pills do. It took me several rounds to realize that they let the paddle grow. I liked that it was so subtle, because it didn't felt overpowering or something - just as balanced as a game of "Pong" should feel like. Absolutely well done, seriously. It feels very polished and was fun to play. :) That's why I included "Riso Pong" in a compilation article about the FEMICOM Game Jam #4, and it's also featured in a little video.
Best wishes,
Sebastian