super fun, works overall.  surprisingly interesting strategic decision making.

Feedback:

• not totally sold on everything sharing the same cd, it forces you to fully commit to an attack if you initiate one instead of balance resources and attack and seems to favor rush strategies and disincentivizes resource gathering.  take that with a pinch of salt since i've only tested on easy and medium so far. 
• nodes are a little too small from a ux perspective, can be hard to click on.  given that there is a radius you can't select in side of anyways, it might be better to make the nodes the full size of those radii
• make esc deselect the current node.  re-clicking on it is too fiddly