Flight Pilot Simulator is a light flight game rather than a full simulator: you control an aircraft over varied terrain, navigate to objectives, and avoid terrain, buildings and other traffic.
It's aimed at the pleasure of flying rather than the procedures — no checklists, just the aircraft and the landscape.
No — it's a light flying game focused on the experience of flying and completing objectives rather than accurate systems and procedures.
Line up with the runway from a long distance, reduce throttle to lose speed gradually, and descend slowly. Approaching fast is the most common cause of failed landings.
Yes — it runs in the browser with nothing to install; lower the settings on older hardware.