Remember

Press E while looking at things to interact. Press Esc to get to the menu. 

Enter each painting in the first room by pressing E. Once inside, interact with the grammophone to hear the sound of what item you should press next. Once all 3 items have been pressed, enter back through the painting on the wall. Repeat with all paintings until they are all no longer blurry and you can no longer enter the rooms. Once that has happened, you have finished the game!