Nice! I like it! It's really cool that there is an online leaderboard and controller support. I can see this being something I could play on my phone while bored. I didn't realize at first that the order of the cards appears before the game starts, but this is a nice modification to make the game a bit more skill based.
One small issue I had was that the sound doesn't work on Safari. But it works in other browsers (and who uses Safari anyway, except for me?)