game-editor.com

Here is one of the first games I made - its very simple.

Just fly around and destroy the fine city of Evansville, IN!

Here it is:
Game Editor Version:
http://www.lostsynapse.com/images/BlowUpEvansvilleGED.zip 2.5 mb

Nice graphics!
But nothing different happens if you drop bomb to downtown, river or corn fields. Perhaps you could add some location detection to make it more interesting. For example simulate flood and spreading fire.
(place location can be done with coordinates but it's easier to make actors that are hidden under the aerial map)