Level 4 press on the table, then again on the table to get the remote control. The remote is on the lower level of the table. The black couch on the left has a battery in the middle. If you know other escape games you can guess that the makers have copied this puzzle from other apps!
Combine the battery with the remote. I used two fingers and pressed and held both the battery and remote at the same time to combine them. Use the remote (with batteries in now!) and turn the television on. You will see 4 lines: blue, gold, white, red.
Under the right couch is a dollar coin. Insert this dollar coin into the vending machine. You can now select the lights and copy the television colors. Set the lights to Blue, gold, white and red. A bottle will appear from the vending machine, with a cork and note. You need to get a corkscrew.
There is a corkscrew at the top of the vending machine. Select the corkscrew, then the vending machine bottle and you will unlock the note. The note contains code: 3945. Enter this code on the door control panel to exit the room.
Level 5 of Escape if you can solutions, the infinity mirror.