Click and drag the hair, shirts, tails, and fins to the doll to put them on. They will automatically snap in place only if they are touching the doll. To change the color of an item, click on it, and a slider variable will appear. The colors for the item are shown below the variable. The item will only change color if it's NOT on the doll. That way you can have the hair be a different color as the bangs. Click on the eyes to change the color. Click on the background to change it. Try to find things in the background to put on the mermaid after you click the "Done" button! You can click on the things you find to change the color!
Big thanks to Sea-Shanty!