Behind the bed head board I would be putting an interesting wallpaper - stripy or floral maybe if you're stayin :)
Other 3 walls, plain neutral either a few tones darker than the wardrobe.
Handles change all for something slightly larger and make a feature of them. Maybe think about getting a radiator with a full length mirror within it (see below) so you can actually use that wall meaning you can move current mirror?
Re hang door so hinges are on right! That give a little food for thought? :)
Rubbish picture but you'll get the jist! https://tse4.mm.bing.net/th?id=OIP.o3Y27Oml_awKlHhIEZ68GgHaJ4&pid=15.1&P=0&w=300&h=300
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