You Must Escape Level 8 Walkthrough: Pick up the battery in the right planter.
Take the lightbulb in the lamp on the right side.
Put the lightbulb in the lamp on the left side. Look inside the fish tank and notice the numbers 192.
Go to the TV and press the button on the bottom, then enter 192. Numbers will appear on the TV: 8892
You Must Escape Level 8 Walkthrough: Complete the picture puzzle on the right wall. Move it, press the keypad, enter 8892, then take the remote control inside.
Put the battery into the remote control. Look at the books on the shelf and it says VOL100. Tap the remote control and raise the volume to 100.
The fish tank will be broken and you can take the key to use on the door.