I kinda like it, its simple, but its a cool cross between real world and pokemon, even though I hope that never happens.
the only thing is missing is:
1. a boarder... 1 pixel black should be fine as it is is most things...
2. text - It looks like it was done in Paint... you should work on making text prettier, it's nothing difficult, though I don't know how to do it with gimp. >.>