Asteroid Quest is a game that I made, and published, in 31 days.
The goal of the player in Asteroid Quest is to get as many credits (the interstellar currency) as possible, as your final score is your net worth. You acquire credits by mining and selling minerals found in the vast asteroid belt that the game takes place in.
The game features 9 mineral types, 26 upgrades, and 18 quintillion possible asteroid combinations (I suppose).
I'm selling the game for a very fair price in order to recuperate some of the money I spent on coffee throughout the project.
Most of the art assets have been provided by the wonderful Kenney.