Doors&Rooms: Stage 1-2
Doors&Rooms: Stage 1-2 helps you understand paying attention to details in the game. Even the slightly tiny lock at the bottom of the door can stop you from advancing through the game.
To beat this stage you can try tapping on the door but it will not open. To truly open it, you need to tap on the tiny lock at the bottom holding the door shut.
Once you do this you will be able to unlock the lock at the bottom and advance through stage 1-2 of the game into stage 1-3.