Observational drawing in biro pen

I drew an interpretation of my room in Biro pen and fine liner, which I drew from a live study not a photograph. I enjoy using Biro as it is excellent for creating detail, and you can really get into drawing an object, being more precise than with a pencil, as pencils lead tend to widen the more you use them.
Nevertheless, I used various techniques when drawing my room. To begin I chose this corner of my room as I wanted to include my wallpaper, and I have a few interesting things on my shelf that I thought would be fun to draw.
When drawing the cushions in the corner I used short sharp strokes to make it look like animal fur. When drawing the wooden shelve I made long softer strokes in different directions to show the shadow on the shelf. I also used more pressure  to make certain things look darker, such as my speakers, and cubby holes. To show rounded objects I used the crosshatching method, lightly on plastic bottles, and darker on the cables. To finish I got a fine liner and outlined any areas that needed extra detail such as the union jack pillow and shelf objects.
 To improve however, I could have been more precise with the sizing of the flower background, and could have added more detail elsewhere, although  I feel I have used a variety of techniques.