You may want to take a screenshot of your blue box for your own enjoyment later. I absolutely love reminiscing over old screenshots of my finished games when they were nothing more than simple colored blocks sliding around the screen. Now it is time to move past that stage and attach some fun artwork to our sprite.
I am providing a downloadable pack for all of the art assets I use in this book. I recommend you use these assets so you will have everything you need for our demo game. Alternatively, you are certainly free to create your own art for your game if you prefer.
These assets come from an outstanding public domain asset pack from Kenney Game Studio. I am providing a small subset of the asset pack that we will use in our game. Download the game art from this URL:
http://www.thinkingswiftly.com/game-development-with-swift/assets