It's very clear there was more planned for this game, as the game loop is functional but not very exciting.
Every moon sells 1 commodity and buys another, it's not possible to even make mistakes since you cannot sell to the wrong moon. So no matter what you do, you will never lose money, only gain. A capitalist's dream come true !
As for feedback, I would suggest lowering the alpha on the backgrounds as Ganymede is the only one that is really legible.
I sold my stuff until I reached 500 and called it a day. Didn't encounter any bugs, so as small as it is, at least it's working correctly !
