...
Is there any goal? can you win the game?
It is reasonably well made, and quite enjoyable up to the point where you have all the upgrades (which isn't all that long!)...
It would be great if you could que up more than 9 units too - it gets a bit tedious after 20 minutes constantly clicking!
So... this game seems to have everything there except content - add a goal and some more units and this will be perfect!