Instructions?

Are there instructions to this game? Don't get me wrong, it's quite simple and all as i have played the first one but what are the gags. So far i have come across what looked like some sorta rodent digging out of the ground and i clicked on it and it turned into a red X? Did i catch it, nothing seemed to happen. It was sorta odd.

The gags are odd things that show up at random. It might be a bear peering out of a manhole or your cow jumping rope. You click on them, if they show up again there will be a red check mark on it to show that you've already found it. You need to click on all of them to get the award. I don't think there is a visible counter to show you how many you've found and how many you need to find.