My first Unity game, a Pong clone with 3D graphics. May be revisited at a later date.
It features three game modes: 2 player local versus, 1 player against AI, or 1 player "solitaire" - try and keep a rally going.
It is available to play for free online or on the App Store.
Issues: touch controls are pretty janky, the AI is too predictable and simplistic, and on mobile performace is sub-par. I'm really pleased with how the web version turned out though.
Cool stuff I used:
Ping is released under a Creative Commons Attribution license, which means you can (and should!) do what you want with it, as long as you attribute it to me.