The first problem I see is that because the background is so busy (I'd have found a different shot without the the sign there, it adds a level of distraction) the text kinda blend in with it all. The buildings and pavement are all fairly pale and beige meaning your white text is going blends right in and the blue outline isn't helping much with contrast.
What could you try is making the background maybe black and white with a colour wash over it, so the text stands out more. Or instead of having the shoes, you could have a line of foot prints trotting along through the thumbnail.
It don't necessarily dislike it, the text choice is nice, but I do think contrast and making it a lot less busy visually will help, there's some elements that distract me (the sign especially) more than attract.