Lighting the Dark Room
Head to the garage once you have obtained the light bulb in the living room. Select the panel next to the washing machine to take a closer look. Place the newly acquired light bulb into the spare slot, for a total of six light bulbs. Mentally label the bulbs 1 to 6, from left to right. Turn them on in the following order: 4, 6, 2, 3, 1, 5. The dark room is now lit, meaning you can enter it.
Cracking the Code
As soon as you have the sponge, dip it in the bucket in the hangar. Use the wet sponge to wash the airplane's wing, which will reveal several colored stripes. Select the panel on the door on the right of the screen to zoom in on it. Press the colored buttons in the same order of the stripes on the plane's wing: blue, yellow, green, white, red, black. Press the "ent" button on the panel, and the door will unlock. You now have access to the office.
Opening the Safe
Once you have won the hammer in the minigame that you play in the office, go over to the part of the office with the large vase. Select the hanging keys, and they will drop into the vase. Smash the vase open with your hammer. Pick up the 13 keys from the broken vase, and the safe key will now be in your inventory. Select the painting on the wall to show the safe underneath. Take a closer look at the safe and use the safe key on it. Place four of the six keys into the four locks. Choose only the keys that match the shape of the locks. Grab the fuse from inside the safe. You will need it later for the control panel of the cockpit.
Saving Grandpa
A guard is in the room with Grandpa locked in a cage. Pick up and throw the soda can inside the door. Lock the door behind the man when he goes to check out the noise. Select the table at the left of the door. All of the wires, A to E, must be attached to the grid at the bottom of the screen. Attach A to the second socket down on the third column. Connect B to the fourth socket down and the first column. Wire C goes to the bottom socket in the fourth column. Attach wire D in the last column, fourth socket down. The final wire connects to the bottom socket of the second column. Press the green arrow to lower grandpa's cage to the ground. Use the Idol of Strength to break the lock and save Grandpa.