Very fun and satisfying to the basic human instinct to click and make number go up. I'd love to see each of the planets get their own fleshed out mechanics for sure!
Obviously so far beyond the scope of a week-long jam to have made, but it would be awesome if the audio was a procedural system like in mini metro, with the new planets adding new layers and the resources collected adding matching textures. The sounds as they were did get a bit sharp after a while, especially and mainly from mercury, and the purchase sound was pretty loud and out of place by comparison, but this game could absolutely benefit from some really cool implementation work to turn the ambient track already there into a dynamic and tasty soundscape...
Great work!