Choosing a project like this with small scope was very wise. The game knows exactly what it wants to be and executes on that very well. Mechanically I figured everything out pretty quickly so kudos for keeping the UI simple enough to pick up with no instructions.
Some minor feedback on the playability of the game now:
1. Your resources should be visible at the top of the screen ALWAYS. Having to click on a main tower to check my stats was more tedious than it was "a fun part of the mechanics".
2. Can I destroy buildings? If I box myself in with farms is it game over?
3. During combat, I couldn't tell what my health was when clicking my units. Was just throwing everything I had at the enemy and hoping for the best.