Extremely well made! The graphics and UI are top notch. The music sets an eerie tone that is apt for the game. (Although I did get a deep space feel: the way the craft moves and debris floating around.). The upgrade system is good. The core gameplay is enjoyable. Deciding whether to mine one more piece of debris or not, realizing you’re going to run out of oxygen, racing towards the top and barely making it. Feels really good to reach the surface for breath. This mechanic makes the game really exciting! (I think the Steel Heart kind of spoils things a bit.) The one minor crib about the game here: I guess it is possible to play conservatively and not have these close calls. The graphics effects are really good, especially the one where you’re going deeper than you should. The game is pretty well balanced, expect maybe towards the end, when things get easy. This is ok, though. By then you really want to get to the ending. Which again, is really good. Your heart races with the excitement of going into an abyss and not knowing what lies ahead. Great job!