This is a very early test render of Europa and Io transiting Jupiter. All three bodies, and the Sun were drawn at 1:1 scale - 1m in this engine is equivalent to 1m in our solar system. Europa is 1,560,000 M in diameter. Jupiter is roughly 800,000,000,000 M from the Sun. Every single body in this scene is drawn to actual scale and the engine is precise enough to draw items that are a few millimetres across.
Getting an engine to draw that range of scales is pretty hard actually, your graphic card certainly doesn't like doing it and there's all sorts of cheats involved. In that scene Jupiter is warped much closer than you think and shrunk to a fraction of its real size.
The hardest part is making a ship fly in a fun way. I kind of mentioned this before, but if you had a WW2 fighter it would take 2 or 3 days to cross the surface of Jupiter at full speed. If the ship flies much faster, and could traverse Jupiter in say 20 minutes then it would be moving so fast that you would have no chance to target and shoot another ship.
The Elite sequels (Frontier specifically) had full Newtonian mechanics, it was two ships flying at a significant fraction of the speed of light towards each other and jousting. Did I hit him? No, lets spend 2-3 minutes readjusting our velocities and try another joust.
The Wing Commander games adopted air physics and slowed the speed down. They were unrealistic for sure, but a key point was it was a game. You could bank away and get on the tail of an enemy to dogfight.
This simulator is fully Newtonian, but you have a flight computer assisting you. It will apply thrust to make your ship go in the way you point. You can flip direction on a dime and you will fly backwards. If you are going really fast it will slow your turning rate down so that you don't get pulped by inertial forces, but if you are going slowly it will turn on a dime. If you really need to turn, then disable the nav computer and flip - it will try to fix your attitude and velocity when you re-engage it.
The test pilots are going to give feedback on how strong the NavCom is and how fast the fighter should be.
(In Battlestar Galactica, a viper can do a 180 turn in 0.35s is that too fast, too slow?)