Good concept, and nice to see a game using bevy :). Notes:
- My solutions to all the puzzles was just to ignore proxies and have equally powerful servers. I’m not sure what I would do to encourage proxies, because I’m not a network engineer, but something should be done for the sake of the puzzle.
- Multi-click by default is not great, I think you should only select more units on shift+click. I accidentally wiped my upgrades a couple times due to this.
I think this game would be good with something like an endless mode and currency for buying more servers, etc. Good Job!