Hi!
Robin: I just had a look at your shop and it looks great. I do agree with Milena though that the pictures could be more bright. Also, have you thought about taking a picture that includes a cat playing with the toy? I think customers would love that!
I have some doubts about the effectiveness of your titles. I recently read this article
http://orangetwig.com/blog/etsy-seo-get-found-in-etsy-search?ref=s a in which I learned a lot about my title and keywords affect my views. You should read it and adjust a few things.
Milena: I love watercolors! I even draw some myself as a hobby. I like the paintings that are on a paper with text. I think I saw one like that on your first page. I would definitely do more like that, but I'd make sure it's a text that people would love to have on their wall. I actually like the idea of newspaper articles or you could take pages from books people love. Maybe a thriller or romance novel. Plus, if you do that, you could use the books title as a keyword, which would generate more traffic.
I probably would not use "Sale 15% off" as the first thing in your title. You want people to know what you're selling first. Also, have a look at the article I posted above. Once you read it, you'll know why it might be more effective to have unique search term phrases at the beginning of your title. You might also want to consider raising prices - I think you sell artwork that's of great quality. One more thing, have you ever tested if you get more impressions if you show the watercolor painting on a wall in a frame? I personally things it's better because as a customer you can imagine what it would look like in real. Like this:
https://www.etsy.com/listing/227917892/fragments-art-print-illustrationI hope this helped and I would very much appreciate feedback in return! :)