Really fun, as soon as I saw all the upgrades and strategy choices I knew it was gonna be engaging! Also loved the visual polish and art style. A few smaller bits of feedback: 1. sound would have been so satisfying, I get just a time thing. 2. the units could go off the right side of the screen to fight the enemies, so I think I missed out on a bunch of the meat because it dropped off screen, and that set me back. 3. It was frustrating that every time I bought a battle unit it moved the miners away from the crystal (though if it was intentional it's kind of a cool choice, it makes things more frantic for sure). Great work!