To access the puzzle library and select a puzzle, follow these steps:

1. Tap on "Play" in the bottom right corner.

2. Tap on the pictures on the left side.

3. Tap on "More puzzles."

4. Select a puzzle you prefer from the available categories or use the search tool.

5. Choose the complexity of the puzzle (24/35/70/140/280/630 pieces).

6. Tap on "Play."

Now you can enjoy your puzzle!