Who doesn't like a bit of Word Play to brighten your day :)
Wonderful idea Selander - and the custom-made decals to complement that are really top-notch! I also like the way you've done those pies, good job on that! The subtle touch with the pirate having his sword at hand is also very nice, especially in conjunction with the background story. And the slight difference in height level between the street and the kiosk makes the regular minifig here (the one buying a pie) look like he's a kid, which is something rarely seen :)
I have a few recommendations that I think could enhance this MOC. First off, don't touch the base of the pie-stall, it looks perfect! However, I think that it could use an awning of sorts, seeing as that would enhance the "street stall" look. That way you could also add something interesting on top of the awning - if you wish, of course!
My second piece of advice would be to reconsider those flowers... The one in the background is fine I guess, but I must admit I'm not too sure about the one in the front. And it's not because it's lacking a petal, it just somehow doesn't fit in there for me. Then again, if you feel those should stay, who am I to tell you to get rid of them :) Perhaps if you want those to still be featured in your MOC, you could add a few more at both sides of the stall?
And the last suggestion I have is in regards to the cobblestone - which is a huge favourite of C-P fans and I'd suggest you work some more on that in order to cover the entire "street" section with 1x1 round plates for that proper cobblestone look and feel. Also, make sure those are randomly positioned, unless you want C-P EBbers telling you how unrealistic those cobblestones look
All in all, a simple yet brilliant entry :] Best of luck in the competition!