Lots of fun! I noticed once I had 10 miners, max damage, miner speed 6, and miner rest 7, with all red gear, it seems like the miners kind of... break? They're just running back and forth on the block they should be mining and hitting it once every few seconds. I noticed immediately that the speed of clearing floors dropped drastically after upgrading either speed, rest, or to my 10th miner, I don't remember which, which is because of this issue. Still, overall great game and I'm excited to pick up the full version on Steam!