Hi I agree there is some improvement to be made about your shop appearance. You should maybe make use of the 5 images you can add per product. I noticed on one of the banners one out of two images is blurry, this could be amended to a clearer image.
You should certainly look into building up your shopfront with "about" info, highlighted items, and cropping your image (in the final stage of adding an item, top right hand side). These will all add to the coherence and "readibility" or your shop :)
You could also add a little more text to your descriptions, like the dimensions, or even an inspirational quote? They look a bit bare at the moment!
Finally I always read that the more items the more views, and the more sales!