If you haven't already, read my blog post explaining about this partially-finished game.
Note: This game is not kid-friendly. There's no gore or cussing or blood or actual violence, but the concept of the game is rather dark, and thus it isn't truly fitting for kids to play.
Use the arrow buttons to select a survivor to send out, then click "Good Luck..." to start. Arrow keys move. Much of the game isn't complete - there is no map yet, you can't pick up glass bottles for some reason and you can't fix light posts or power houses, which means you really can't get far in the game at all yet.