I like the idea of using astronomy as a concept for an idle game. I'm aware that this is an early demo of the game but this is not too bad, although I really wish the Moon upgrades were just not there to begin with to avoid wasting money.
One suggestion I would like to make is to improve the font for the upgrades' price tags. Some prices can appear blurry and difficult to read. For example, some upgrades that cost 500k look like it says 600k instead or vice versa. It would be nice to enlarge it a little.