Good, but limited
Don't get me wrong, this is a great game that has frankly huge potential available to you. The problem is that it starts off too advanced. Mining doesn't start with a well set up town and some pretty fancy drilling equipment, then gradually improve the equipment over time.
PERSONALLY, I'd have started off on some backwater asteroid or planet and only be able to mine a few resources from it, either by hand, or with limited extraction tools. When you get the commodities to the surface, you can choose to store them in a warehouse, which will cost you, but the price of your commodity might go up on the international markets. Keep an eye on the news, to see what sort of things are happening out in space and what resources are required, as rival companies step up production or hit snags on their own projects.
Yes, there was a decided lack of end goal to this game, as once you've got all of the medals, you're left with a map that looks like a Swiss cheese, still studded with ores and so forth across the map. I'd love to see the map which you can zoom out on, to see where you have been digging and have a lot still to explore around, as there are pockets like that on the map, as I can't do the "hellevator" trick, until I'm really advanced in the game and by then, it's just become a little boring.
The graphics are fun and so is the gameplay in the early going, though I'd have liked to see you make more of this game, since you're clearly capable. For research, I'd suggest "Diggers", the 1990s computer game, which would be a logical progression for this game to take.
[Review Request Club]