Very cool! I was drawn in by the nice dark color palette, and I stayed for the game loop! Having enemy spawners constantly looping around what you've built up, alongside helpful things like friendly troops or markets made for some surprisingly deep gameplay. My only real suggestion / critique, is that the tutorial was a bit tricky to grasp with all the reading. However with as many mechanics at play as there are here, I don't think there's much avoiding that in a jam setting.
Well done! Had fun and enjoyed the vibe the game brought :)