Elefunk
Here's the thing about Elefunk. By itself it can be a quite frustrating experience. The physics are hard to predict, and sometimes your bridges seem to break unfairly. Also, the additions of the little monsters (meerkats, mice etc.) can be a huge pain. But I guarantee that if you play this with friends, and I'm not even talking about the multiplayer, you will have a blast. I have already spent hours with friends trying to figure out how to set up the bridge, consistently with hilarious results. These sessions usually end in the dunking of an elephant, but nevertheless, if you have a playstation and some friends, there is no reason why you shouldn't spare the 5 bucks to buy yourself this game.