I understand you wanting to test the water but only having 4 items in your shop doesn’t really give people anything to look at. Imagine walking into a High Street shop and there was only 4 items, you wouldn’t stop around for long!
Promotion is key. What do you do to promote? There are promotional threads here in the forum for you to join in.
Do you have a facebook business page? Personally I find it very slow going but many use it successfully. I get a lot of views from twitter. I also use pinterest, wanelo, stumbleupon, instagram, tumblr, flickr, craftjuice and probably some more that I can’t remember at the moment
Your shop and your prints look good so I’m sure it’s just a matter of telling people how to find you
PS, I’ve just given your shop a tweet and followed you on twitter