Easy, just follow the steps. 1. Go inside (no need to remix anything) 2. If you look down, you may see a tab called backpack. 3. Click it. 4. Once the tab is open, Choose the sprite(s) you want to use. 5. Once you've chose your sprite(s), Click and drag the sprite(s) into the backpack. 6. Go to your project. 7. Open your backpack and take out the sprite(s) and add it to your project. And Press L on your keyboard