The art style is really clean, the transitions are smooth, and the music and sound effects are great. It's fun and addictive.
A few pieces of feedback: I was a bit confused about what the Miner actually does. I stacked a lot of them thinking they would boost my economy, but it didn't seem to work that way, so clearer onboarding or descriptions for each role would really help. Also, when I lost on level 4, I went back to the main menu to retry the level, realized there was no level select, and had to start all over from level 1, which was a bit frustrating.
Still, overall it's a very interesting and solid game. Good job!