Practice 30 moon landings with a simulator.
Change the gravity setting and successfully do it on the 31st try.
When Neil Armstrong did it, the final approach and landing were done "by the seat of your pants" --- there was no computer used. The de-orbit burn did use a primitive computer. The final approach and landing did not use a computer.
The craft was not flying (no air), it was translating.
There was no aerodynamic stability. - The was no aerodynamics.
When you successfully do it, post a screenshot. :)
IMO it would be the ultimate test that would be easy to do.
settle it for all
It is definitely possible, but that not be at least cheap to do. So, it has to be financed by some very wealthy entity. But all that wealthy entities are highly discredited now, and whatever they get as result will be questioned.
https://www.flightgear.org/
That's wrong simulator. KSP is much more suitable. 42 is way better, but needs specific knowledge in orbital mechanic to use.
Also, if you are much into flying, it is much better to spend time and money for few real flights on some Cessna or Piper with instructor than on that computer garbage that does not give even a percent of real feelings of flight.
OK
That was one of the very first simulations written, when ported to a pdp-11 led to the development of Unix
Spacewar