Very high quality! A few minor suggestions if you end up expanding this game/ releasing it to buy:
Add hotkeys for placing pieces. It was a bit inconvenient to keep moving my mouse from one side of the screen to the other. Perhaps if multiple of one piece are being placed in the same turn, then right click can be used to place just one, and keep another copy of that piece "on the cursor"
I think this game has a lot of potential!