What a wonderful idea! I love the originality, and the title just made me laugh. I love the perspective that you used, and the bright contrast of the red shirts with a background of more muted colors. Its such a touristy thing to do.
Also, wonderful little details keep catching my eye-such as the eyes in the window, the frying pan, the clips in the girl's hair (she has a -perfect- expression too, btw), the levels of the city...and is that a broom I see in one dwarf's hand...?
Wow!!! I imagine them going to a dimension and realized that the building looks different from where they came from and they decided to go in one of them and that's how they've encountered dwarfs. Great painting and thanks for the inspiration