Simply drag the numbered blocks into the slots provided. If you prefer, you can click on a block to select it (it will flash) and click again where you want to drop it.
The top button gives you a new puzzle using the current settings.
The next three buttons are ?reset blocks?, ?get a single hint?, and ?get complete solution?.
The bottom button takes you to an options screen where you can adjust the difficulty to your liking.
Suggestion: The 2 × 3 starting setup is pretty easy. When you?re comfortable with that, try setting the puzzles to 3 × 3, and give yourself a single hint to start you off.