This is a really lovely game!
For a game with so many resources, plus mechanics like combat, researching, building, and so-on - it's all very simple and intuitive to grasp. Plus the visuals, music, and sounds all combine to create a very relaxing and laid back atmosphere. It's honestly a very soothing experience.
For feedback, it's very easy to get overpowered. I stockpiled resources because I forgot to upgrade, and suddenly I was doing massive amounts of damage to anything. I think enemies should scale just a bit harder - not enough to reduce how relaxing the game is - but enough to make them not redundant. As is, I can one-shot nearly anything from several tiles away and never have to worry about it, which makes collecting resources a bit more mindless, and takes away from the engagement I had at the beginning.
Otherwise, this is a very well put-together project. Great job!