"If you have extremely bad luck, you might encounter a battle as you step onto a specific dialogue trigger in the Gem Mines. This is an incredible rarity, but apparently it’s happened to some people." Well as unlikely as it is, it just happened to me, and have 2 fights going on at once, all buggy.
I think the dragging a piece around square by square makes it more dull then it should be, if you make it possible to swap tiles from any distance and just make the time shorter it would be a more exciting game.
I like the fact there are defense missions. Scout artillery combo works nice too. I like what is there, it just needs more. A few more missions and a better story would help. I look forward to your next rts.
You have to carefully figure out which gun is most effective in which situation. That will help you save ammo on the stronger weapons for later in the level.