Improving!
Hey man, I've played all of your other versions and i noticed that you've really listened to the constructive criticism some people gave you, I find that pretty cool ^^.
This game has lots of potential, you just have to add some other stuff like :
<->Better artwork
<->Upgrades for the buildings
<->The ability to place buildings wherever you want
I hope I was some of a help
Good luck!!!
Bart