Play Tidal.  Instructions can be found in-game by hovering over the “How to Play” tab at the left. If you don’t see the game, you can install Microsoft Silverlight from here for Mac OS X or Windows (or Windows users can also get it from Microsoft Update).

Title: Tidal
Tagline: Hold your cards or pass them on, but don’t get flooded.
Dimensions: 700×500
Short Description: Tidal is a semi-strategic card-passing game played with a subset of standard playing cards. Hold onto your cards to try to create a passing wave that pushes your opponent over the edge.