Status Bars
The status bars, located in the top left of the screen, display hull integrity (top, green bar), atmosphere (middle, blue/dark red bar), and battery charge (bottom, red bar).


Hull integrity
The remaining toughness (i.e. health) of the ship. This starts at 100% and decreases as the ship takes damage. If this falls to zero, the ship is destroyed.
Hovering over this bar will display the toughness as an absolute value, rather than a percentage.
Atmosphere
Oxygen and CO2 percentage in the ship atmosphere. The ideal is 100% oxygen, 0% CO2. Oxygen, the blue portion, expands from left to right. CO2, the dark red bar, displays on top of the oxygen bar and expands from right to left.
Hovering over this bar will display the oxygen and CO2 percentage values.
Battery charge
The percentage of charge across all batteries on the ship.
Hovering over this bar will display Mw values for current power production, power usage, and power stored.