This video explains how to import assets into a 2D game project in Unity. Assets in your game will include items such as background images, character sprites, objects in your game scene, materials, and scripts that will control the game.
We will get started by adding a sky background, the ground, and a player object (ball). To add assets to your game, you simply drag and drop files directly into the Assets panel. Files you might like to add include images for backgrounds, spritesheets for characters, animations, sounds, and materials.
To see how this is done, watch the video below.
Next tutorial: Adding physics and colliders to your 2D game