By making a game about flowers.
http://kotaku.com/5025626/flower-info-screens-clips
Basically, you control the wind, guiding flower petals around. That's about as casual as you can get without being a screensaver. The game does look nice, but there's a chance Kotatku hasn't fixed the clips, which at the time of this posting, are RE5, not this game.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs