Animal Crossing: New Horizons is a social simulator game developed and published by Nintendo.
Collect Resources and Craft Tools
Most of the items in Animal Crossing New Horizons can't be bought and you'll have to make them yourself in Tom Nook's workshop, with whom, like other NPCs on the island, you'll need to build good relationships.
Become the Architect of the Island
In Animal Crossing: New Horizons, you'll eventually get the tools to dig new rivers, build bridges across them, or turn water into land.