WEll, I didn't make it to the 3rd round either, so you might not want my advice, but I will give you mine if you give me yours! (check out my DET entry and leave me CC too please).
OK, first, I think your layout is a bit busy. My eyes really don't know where to go or focus. If you notice, most of the layouts that made it were veyr simple. I think while the alpha is great, you might use it to empahsise words like COOL DIP rather than using the alpha for the whole title (or sentance). OR even COOL SUMMER. The date is all broken up and might look better all together. The orange text is hard to read on that green background. (So I am being nit-picky here because overall it is a really great layout, but DET looks at the nit-picky stuff).
Anyways, I hope that you take the advice you get and rework your layout to give 'em a WOW, wait til I enter DET next time!