Good Job
Although it was a bit generic, I think this game did a good job overall. However, there could have been more variety, for there were only 4 towers, 3 buildings (except for the landmark, of course), and 3 different types of enemies.
Also, the difficulty was perfect, it was not so easy that you were bored near the end nor so hard that you became frustrated and wanted to quit. All in all, it's a solid flash.