Ok, first let me say that I'm a long time member of a home design forum where the group critiques and makes design suggestions so am hoping I'm not being too blunt or cold.
The room looks neat and roomy but is devoid of any warmth or personality. I don't look at it and think of being cozy and relaxed. First I'd add some artwork to the walls, a nice big canvas above the bed would be a great start. A smaller, complementary piece between the windows would help. Something on top of the wardrobe would be nice, a collection of baskets or some folded blankets. The nightstands are a bit low in that it puts the lamps below the level needed for reading in bed. You could also put some lamps on the wall. Add another color to the room. Red always looks nice with chocolate brown. A red throw or pillows, then tie in some red in the artwork. A plant on the dresser or a nice tray to put jewelry at night is useful. Also, a mirror over the sink would be useful. When you hang artwork don't put it too high, generally you want the center of the art any about 65 inches from the floor, i.e. Average eye level. Also, I don't see anywhere for a guest to hang a towel. If possible put a couple of towel bars in the bathroom, maybe labeled for each room with a cute sign. Do you provide towels? If so, show a stack of thick fluffy towels in your listing pics. It would look nice to maybe prop open the wardrobe door and show the stack of towels in there assuming there is a shelf. A hook in the back of the bedroom door to hang a robe is nice to show. It's a great layout and home, as you can see I'm having fun imagining adding to the decor!
Cute pillow,some artwork etc