Press space, the left arrow key, or click the screen to go to the next backdrop. Press the right arrow key to go back. You will only be able to access this if you are part of the "Team". Simply enter the name I have assigned you (I'll have told you in your profile comment section) and you will gain access to the script!
This is the full script for the first comic of "The Smile". If you have any questions about what I said, whether it be for the background that needs to be drawn or where exactly a character is, or what they're doing, just ask in the comments.