Disclosure, I like mining. So I might be biased. But this game is excellent ! I would give it a 9 or a 10, but I admit the bosses can be frustrating to fight, the vacuum can be unwieldy and there are a few bugs. Some enemies disappear and traveling up or down too fast can mess up the game.

It's all a constant choice to make. Continue to mine or get back to your machine early to defend it ? Spend more on weapons or mining implements ? There is no true optimal option and add to that having to contend with different bonuses every run, for a great time.