You can change the layout of the page with style sheets items, globally to change the background color or the font of the buttons, or conditionally for each game.
If the style applies to the whole row in the table or a specific column, it can be triggered by a condition.
A condition can be based on the deadline (passed or not) or the value of a column, and the value of the flag for the game.
A good and simple tutorial about the syntax of style sheets is here
The big reference document is here.
Here are a couple of examples:
body: background:#00ff00; color:#ffffff body: background-image: url("http://somewhere.com/image.gif") body: background-attachment: fixed body: background-repeat: repeat font-family: Verdana, Arial, 'Times New Roman', serif font-weight: bold font-stretch: narrower font-size: smaller font-style:italic text-align:center