Thank you for the additional feedback! We will add volume settings and a better hazard spawning system soon.
The fire does not eat up any extra oxygen. It's only there for cosmetic effect, to help indicate that your ship is badly damaged.
The TAB objective system shouldn't be there. We will remove it in the next update.
The UI closing itself after the warp is just to get you out of nav mode. It makes the transition from navigation to mining more seamless and less annoying, since you cannot lock targets and use your laser in nav mode.
Repairing near the station empties out your cargo hold just to punish you for not repairing after docking. I'll adjust it to be more fair in the next update though.
I'll see what I can do about adding easier tab navigation, or if I should add vertical movement. I'll also see what could be causing the problem with the tutorial.
Thank you for bringing these details to our attention! I will get back to you as soon as I release the next patch.