Great graphics! Some comments:
1) the tower tooltip is overwritten by the "perfect wave" message,
2) sometimes the upgrade buttons are confusing, make the upgrade option disappear or be grayed out at level 3,
3) "restart" and "fast forward" would be nice
I like the abstract concept, 3/5. But there's a lot of room for improvement, animations would be my first pick. Game balancing the next. My comment was too long so i will send a message instead :)
there seems to be something wrong with the collision detection. maybe make the dot movement a bit more fluid so they are easier to "catch" but at the same time make the pen slower or something?
I think it needs more in-game help, for example tooltips for each building and unit in the menu. "Mines make gold", "swordmen are strong against axemen" or something like that :)
Also, since you can see how many units are in a square by attacking-then-cancel, why not display that number directly?
Very nice navigation system, refreshing original graphics, clean interface. I like the real-time battles too. 5/5 so far :)
But there is far too much clicking on tiny objects during battles, 3 clicks to make a character attack could be improved...