Good
A+ For Game design, F for historical accuracy. The scenery and other aspects were completely off. Anti-aircraft guns weren't used at all, and dogfights only began in the last year of the great war. Up until then, guns weren't used on planes; they would even wave to each other in the air. Plus, the mountains and beautiful scenery are nice, but nothing like a war-torn trench battlefield with no man's land and artillery flying everywhere.
Probably better suited for world war II, but even then the scenery should be changed.
But, like I said, great design, just a few historical flaws. Keep it up.