I got this game in a bundle a while back, and it's surprisingly addictive and very fun.
You crash land your hot air balloon on an island, and your goal is to repair your balloon and go home. In order to do this, you must perform tasks for the natives, which usually involve crafting or cooking various items for them, or delivering items to someone else. Rather than climbing trees or digging for things yourself, you use one of the many animals roaming the island to do it for you. As the animals level up, they can climb higher trees, dig tougher rock piles, and fight stronger...other animals, for the items they drop. Sometimes, they will drop an egg, which you can hatch into a new friend. Collect them all!