Pixel 1:
Look at the turquoise pot on the mantlepiece. Behind the left corner of the lid.
Pixel 2:
Look at the picture on the wall to the right of the mantlepiece. On the upper right is a roman II.
Pixel 3:
Look at the plant on the small table on the left. Behind the orange branches on the left.
Pixel 4:
Look at the legs of the small table on the left. The fourth bar from the right on the right set of bars.
Pixel 5:
Look at the yellow shade of the lamp on the ceiling. There are light grey dots on it. Click these.
Pixel 6:
Look at the blue shade of the lamp on the table in front of the window. There’s a 6 on it but that’s not the one. On the chair on the left, under the (viewers) left arm is a little corner of the correct one… eeehhh six.
Pixel 7:
Look at the top row of yellow dots in front of the window. In the right corner of the upper left window pane is a light green stripe.
Pixel 8:
Look at the grey base of the lamp on the round table in front of the yellow dots. On the green shade is a light grey square.
Pixel 9:
Look at the books under the table in the front.
Pixel 10:
Look at the seat of the chair on the far right. The pixel is on the red tapestry.
Game source: A copy of the game was found here on the internet.