Honestly a really REALLY cool concept. I'd love to know how much resources each of the upgrades cost, and how many each planet generates. With that, and if the game was like 30% slower in all aspects, I think it would be super strategic and fun. I really love the simplicity of the mechanics, but which lead to some surprisingly awesome strategies. Would LOVE to see this developed further!
By the way I think there's a bug where sometimes you spawn without a home planet, but it doesn't end the game so you can keep selecting planets but not send any troops. I'm guessing that's why some people are getting "no feedback".