Hello!
I found this game by chance looking at 'BaronVonLetsPlays' YouTube channel and I just had to buy it, loving it so far!
I have a few suggestions to make, which I'm sure you might have already thought of!
Longer day/night cycles, I find that the day goes far too quickly as does the night, in my opinion.
Decrease the Hunger speed, I also find that I am hungry within 1-2 minutes of eating, perhaps make it so that a full meal lasts at least 5 (real time) minutes.
Slower oxygen/suit depletion - Again, I find that my suit's power and oxygen levels drop way too fast, even if you stand still, it drops too rapidly. I understand that there are oxygen tanks, but I think that the rate of which it depletes is still too fast.
As those above me have said, a map/radar system would be perfect.
Cheers for making such a cool little game and I look forward to seeing it grow and being a part of it's community!
Regards,
Jono.