I have played this game for 3-4 hours now and the concept of "you have to collect ressources but the more you harvest the planet, the more enemies spawn to attack you" is very solid. For now I have some question, opinion and suggestion :
-The space is definitely big and somewhat empty as far as I've seen, I've only seen some static asteroid with great ore in it or some sort of varying sized bees trying to attack my ship but I go too fast for them. It looks like sort of loading screen, but you have to hold some button to progress that loading. Maybe doing some sort of event like moving asteroid filled with great ore or more powerfull enemies with great reward can be interesting.
-Maybe change the way the robot tells you tips because as far as I see he tells tips randomly and regularly and this can get boring, maybe make it talks about stuff happening on screen such as talking about the yellow ore when the player is harvesting some yellow ore.
-The artifacts should have a sort of rewards because for now, they are just objectives to the player to finish the game, I don't really get satisfied when I got one because they basically do nothing special, maybe some of them can unlock some special abilities or improve your weapons in some way like "make you ship shoot three projectiles instead of one" for example ? Maybe it's the same issue about the boss hearts but I don't get a single one for now.
-Where are the bosses ? For now I've encountered two mouth black hole and one big worm poping out the floor and shooting stuff at me. I suppose they are the sub bosses but I haven't encountered a single big boss yet. Maybe I should explore further or go deeper but when I go deeper I encounter grey block which I suppose is bedrock.
-I like the atmosphere a lot, it's like Risk of Rain but more eerie and creepier, the music help a lot.
I will go further in the game, it has very good premise. Looking forward for more content because the game can be kinda repetitive with time.