This was awesome! Combining Minecraft style resource gathering with tower defense is brilliant! Having a separate resource track to build and then staff the towers was a clever way to better control ramp up, but I noticed that when I didn't upscale my towers early enough I got outmoded, and then I couldn't take the enemies so I couldn't raise the gold to staff the towers so I could take the enemies, so I got stuck. I did make it to level 22, but when I couldn't stop the boss at level 20 I knew it was over. Is there a way to delete old towers, move recruits from one to another, or build a better tower over an old one? This is just great, though. And hell, a fully animated tutorial video? Amazing polish!