Very fun game!
I haven't finished it yet, but I can give you some suggestions.
1) Mouse drag "pan move" would be very helpful
2) Zoom in and out with mousescroll too.
3) Some way of swapping two units would make units positioning easier
4) There is no way to send some unit to a place, that it can't reach in one turn. It would be nice to have this feature.
Despite that, I think this game is already fun to play. It has nice graphics, pretty clear interface, short but good tutorial, and it's not too easy.
You may consider adding some sort of animations to moving units (at least some shaking or whatever) or/and some particles. Maybe some tweening to UI would be nice too. It's just my personal fist impression, that game lacks this final touch.
Good job anyways.