Your tama has to be at least 3 lbs above its base weight to play a game. Remember though that feeding to many snacks just to play games will give your tama a toothache and that goes on as bad care! I just keep checking my tamagotchis weight and only play games when his/her weight is 3 or more lbs over the limit. When my tama doesnt want to play anymore, I wait until it beeps for food or until I feed it a snack to make it happy before playing again.