I liked this a lot
Well done on creating a very strong multiplayer game. I really like how you arranged how planes take-off, fly, stall and boost their abilites.
All the planes look great and their individual sounds make them sound like seperate air-craft.
I have only 2 small qualm with this work of yours. The germain plane is a World War 1 class of airplane. All the ther planes were used during World War 2, so the German plane looks a little out of place here.
The second problem I have is when the game announces a winner. Everytime a different team wins the game says that Player 1 wins. I've played the game several times and after letting each team win the result is the same. Is this a glitch in your coding or did you mean this to happen?
Overall I like this game a lot. I hope you can expand upon your idea and possibly make this into an online game.
Good Luck.