When I started many years ago, the best piece of advice I received was to write descriptions as if you were describing the image to someone over the phone. I suggest you give that a try.
Unless you are someone who already has an audience, 200 products is... a good start. You cannot depend on Zazzle's marketplace to bring eyes to your products. You need to do all of the marketing in order to get people to see your designs. To Illustrate my point, you have a shirt titled "Vibrant Jellyfish Sea Life". If you type exactly that into Zazzle's search, yours is the second result. Which means that if someone types exactly those words, you will be seen. It is far more likely that someone searches for "jellyfish shirt". Give that a try, and look at the results. You're on page 2, so you should be pleased. But look at the other results. The same images across different shops is indicative of spammers. You are always fighting spam here. Look at your titles, search the way a person would search, and really look at the results.
