^Since your entry is most likely to be misinterpreted and some will say you used bokeh effects which I know isn't because if I assume, you're entry's polka dots is made with a brush, right?
I'd really say that #1 and #3 followed the theme exactly and not only #3. Since there are several ways of using the polka dots effects afterall(excluding its use in lighting). Only that, #3 lacks a certain flow and appeal. It is appealing in color but it looks kinda bland in terms of its flow, because, just as what I said, the whole flow of #3 is wholly exploded everywhere that it doesn't move my eyes to a certain direction which is the focal despite the tag being small in size.
Congratulations, btw, my dear.