Locating and adding the art assets

Follow these steps to add these new art assets to the texture atlases in our Assets.xcassets file:

1. In Xcode, open the Assets.xcassets file and locate the texture atlases you have created. You should already have folders for Enemies, Environment, and Pierre.
2. Locate the Enemies folder in the downloadable asset bundle. You should see art for all of the enemies, including the Bat, the Blade, the Mad Fly, and the Bee.
3. We can skip the Bee art since we already added it to our project. Excluding the Bee, drag the rest of the asset files into the Enemies texture atlas in Xcode. You should be dragging 12 files into Xcode (two animation images per enemy, each with two resolutions). When you are done, your Enemies texture atlas should look like this:
   
4. Great work! Now, we just need to add the art for the two coins and the Power-up Star. Locate the Environment folder in the downloadable asset bundle and find the asset files for the Bronze Coin, the Gold Coin, and the Star...