To solve a puzzle, follow these steps:

1. Tap on an unlocked puzzle in the Gallery on the main game page.

2. Scroll through the tray located at the bottom of the screen to find a piece that matches one of the outlined areas on the puzzle.

3. Drag this piece to the outlined area.

4. New outlined areas will appear as you complete each section.

5. Keep playing to finish the puzzle.

Once the puzzle is completed, a new one will be unlocked!