You need to find 10 playing cards. When you’ve found one it will appear in the top of your screen. The row will start and finish with an empty space.
Card 1, 10 of spades:
In the left top corner of the left window.
Card 2, Jack of hearts:
Zoom in on the top 2 pictures between the windows. You’ll find a J in the middle of the left picture.
Card 3, King of hearts:
Zoom in on the plant behind the chair. The card is in the plant just under the window.
Card 4, Ace of spades:
Zoom in on the round table between the sofas. The Ace is in the left top corner of your screen. Ignore the card in the bottom corner on the right, this card is underneath the bar to go back to the room so you can’t pick up that card.
Card 5, 3 of diamonds:
Zoom in on the fruit. The card is on the middle one of the red fruits.
Card 6, 8 of clubs:
Zoom in between the left leg of the table and the chair. You’ll find the card in the chair.
Card 7, Queen of diamonds:
Zoom in on the 2 pictures on the wall above the side table. The queen is on the left side of the frame of the picture on the left.
Card 8, 5 of diamonds:
Zoom in on the plant on the side table. The reverse 5 is your card.
Card 9, Ace of clubs:
Zoom in on the top part of the plant behind the couch. The ace is in the middle of the plant.
Card 10, King of spades:
Zoom in on the square side table. The card is on the back leg.
Now you found them all, you can leave the room through the green rectangle on the floor.
Game source: A copy of the game was found here on the internet.