i have ALWAYS loved games to do with survival and this is one that captures it really good, but you quickly find out your just collecting materials to build things. it features a number of islands and areas within those islands, you can build fires, hunt fish, cook, harvest plants/veggies/fruits and nuts and make meals on said fire, the skills increase with use. just like any sims game you have needs, an energy metre, bladder metre, social metre and so forth. the later is quite humourous. on the first island you play, you can make friends with monkeys, you can name them, interact with them and when you bond with them enough, you can ask them to gather materials like food and building woods etc.
you start off with a pocket knife, a basic sleeping bag and some toilet role..but by gathering supplies you can craft other materials. such as the clam shell axe and a bamboo harpoon used for catching fish. one of the things that lets it down is when your character eats something without being cooked, like a coconut or banana, the mouth looks really really funny. a really creepy smile and when they eat..its even creepier. then they just toss away the remains behind them and go back to looking normal.
you gain goals from books and bottled notes you find washed up on the beach, explore enough and you'll find the way to the next island with bigger objectives, such as building a radio transmitter.
all in all this is the best sims game i've played on a handheld.