This complete walkthrough is for Level 2 of U Must Escape. With this guide, you will be able to escape from the bathroom in no time.
You start this stage inside a bathroom. You have multiple places to check and fix before you can find the final key.
1. Check the medicine cabinet above the sink. Open the Cabinet and get a plunger from inside.
2. Use the plunger to unclog the sink and recover a screwdriver.
3. Use the screwdriver to open the toilet tank and obtain a knife inside.
4. With the knife, use it to pop open the tile next to the tub. You can then grab a tub faucet handle.
5. Now head over to the tub, use the tub handle to turn on the water. A key appears from the faucet for you to open the final lock.