Looks great! Very playable and not too hard to understand. You have some nifty features which one would not expect from something like this (ie. rally points).
Some suggestions:
-Avoid the ability to stack buildings.
-Clicking is a tiny bit too delayed.
-How about some more stuff to do in-game? It's a great shell for a game, but there's not much one can do.
-A selection box, as is seen in most RTS games would be nice and make it easier to control multiple units.
Also, I attacked the other base's settlers, and then my units moved off the screen or else just disappeared... What's this?
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.. who suspects an army to be in a castle... err? Haha
. (Im not sure if this is the problem for you building things.. but you click a 'Build xxx' option from a Settlers menu, click where you wish to place it on the map, and press Enter to confirm it.)
