Pixel Art sprites are created using the Pixart Editor or added from the Asset Library.
From Toolbar > Build > Pixart you can add any of your Pixart sprites to your scene or open them in the Pixart Editor.
To create a new sprite tap the plus icon on the left.
To duplicate or delete a sprite select it in the toolbar then tap the plus icon on the left.
To add a sprite to your game select it from the toolbar then tap in the scene or drag the asset into the scene from the Toolbar.
To edit an asset select it from the Toolbar then tap the pencil icon in the upper left corner of the preview. This opens the asset in the Pixart Editor