Meh.
First off, very nice.
Doors were hard to see while in houses. And I would've liked to be able to move in more than one direction at a time.
Houses rotated at 90 degrees just look like houses tipped on their sides. Some perspective would be nice.
This is probably the sort of project to be undertaken by a group of people. It's not bad for a solo effort, but it would really shine if you got someone to do the art for you.
I feel really bad leaving such a low score for this, as I know it would have taken quite a long time, but the game really suffers from the graphical design and limitations.