Return to the Side Porch (click back once, forward once, right once). Click on the Box (1), use the Colored Tiles (yellow) on the Top (2), click on any 3×3 section (the first 2 moves are shown. Click the orange tile times and click the green tile once. This will solve the Blue tiles) to rotate the perimeter tiles clockwise, right click to rotate them counter-clockwise (3) so you end up with them arranged (4) according to the diagram. Collect the Window Handle (5).
The key to solving this puzzle is to do one color at time. This puzzle begins the same way, each time, so the logical choices would be to complete the Blue Section, then the Orange and then work on the Red and Green together. You can rotate the tiles clockwise (click) or counter-clockwise (right click), which makes solving a lot easier than the in-game instructions (click to rotate clockwise only) indicate. Click on the following for the video solution. Note: clicks will show a Red circle and right clicks will show a Yellow circle.
The Next Black Cat Walkthrough The Downstairs – Left Side Part 3, Return to the Formal Parlor (click back twice, left once). Click on the Window, click on the Latch and use both of the Window Handles on the Latch . Click on Right Handle, click on the Latch and then collect the Tweezers from the Window Sill.
Return to the Front Hall (click back twice). Click on the Door, use the Tweezers in the Lock, use the Garden Key in the Lock, click on the Key, click on the Door and then click forward to enter the Back Porch to the Garden.
Thanks to GameZebo for Black Cat Walkthrough.