I tried pulling the git repo locally to run it, but there's loads of images and map files missing.
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Hi thanks for playing. I had an issue with the art assets because I was using a set with over 70,000 individual sprites, this one https://opengameart.org/comment/32707. But now I have adjusted the units to use a sprite sheet.
Instead of putting the art on github you can download it from the game downloads page.