Mining + TD is such a great idea, I love the concept. The entry itself is really solid, but the core loop is missing complexity (everything on the planned worker features list sounds intriguing). Coupled with the dynamic paths the obvious thing was to just place towers just at the end of the route instead of spreading them across the map as I saw no incentive to do so. If you work on it some more, I'd love to see where it goes.
I'm not sure the music fits, but I really like the track (still listening to it now actually) - for me it's too chill for a TD game/enemy waves. Also a tiny nit - the audio should not start at 100% IMO. Props for having very nice settings (though I'd have preferred having one of the worker features instead).
BTW. I got a panic on my second run (I tried hard), I think it happened when one of the buildings was destroyed
`error[B0003]: Could not insert a bundle (of type `entytd::enemy::Behavior`) for entity 7208v261 because it doesn't exist in this World.`