The game starts with you, a human boy or girl, riding in a cab being quizzed be a fellow named Kapp'n; the quizzes determine your appearance and gender. When you get off the cab, you enter into a small village filled with a colorful cast of chatty townsfolks, cute animals who walk and talk just like humans; these are your new neighbors, so you will be seeing plenty of cats, dogs, hippos, birds, monkeys, and a host of others walking around your new town. At first your town looks a bit plain and deserted besides a beach, a few trees, your neighbors and some buildings; this of course is where you come into the picture, as later on, you can customize and drastically change your town's appearance with all the tools and activities at your disposal.
In ACWW, there is no ending or important mission for you to accomplish. Though there are goals recommended to be completed, you're technically given the choice to do what you want in this game. ACWW was built to be a free frolicking open-ended playground for you to enjoy alone or with online players; preferably, you'd want to get the full experience by playing it with other people online. The peaceful atmosphere along with the wide selection of projects available in this game is why Animal Crossing was a huge hit for the Nintendo Gamecube, and the same formula remains intact here for the DS game with some new improvements.
The touch screen can be applied for all the important aspects in the game- moving your player, selecting items, writing letters, and doing other activities. The DS inputs sounds like an accessible feature for the Animal Crossing newbies, but in the long run, it's best to stick with the D-pad and buttons for most of your daily routines; this control method responds better to what you want to do and it will be less strenuous for your hands.