2. Zoom into the back of the heater by pressing on the right side of it. Pick up the skinny pole behind it.
3. Go to the bookshelf area.
4. Press the box on the right to move it closer to the bookshelf.
5. Now press the safe on top of the bookshelf. Zoom in and enter the code: Green Red Red Blue Green Blue Red (You get the code by zooming into the fish tank on the shelf and looking at the color of the fishes from left to right.
6. Pick up the hook inside the safe.
7. Now press the pole in your inventory twice to zoom into it. Now press the hook in your inventory and press the zoomed in pole to combine them.
8. Go to the desk area.
9. Zoom into the green tank on top of the desk. Select the long hook from your inventory and get the key. Use the key on the door to open it.