Here's a game that will make you laugh from The Vegetarian Society: "Remember SPACE INVADERS - the game that spawned a generation of games and game designers?"
Try Veggie Invaders

"Download some free retro action and prepare for the onslaught as vegetables take over the world! Ketchup splurge guns a-go-go, the heat is on as pop-eyed potatoes and crazy carrots make mincemeat of anyone who dares to challenge their veggie might."