Clearly a Flight Sim ...

As for the REAL crash ... the pilot obviously had some sort of medical distress (heart attack?) OR there was a major mechanical failure on the plane that not only threw it out of balance but also cut the electrical power to the radios so the pilot couldn't even say "Mayday".

The crash investigation will show if there was mechanical failure of the type needed to cause the crash but it is unlikely that any autopsy on the pilot's remains will be able to show anything because of the post crash fire.