Hints:
1- Click on the switch.
2- Press the button.
3- Memorize and enter the code on the keyboard.
4- Enter the code.
5- break the lamp.
6- ??????????????????????????????????.
At the third level, there is an error, because of which the keyboard does not work.This is solved by restarting the game page.For some reason, there are no bugs in the GD games version.