This was quite bad...
I can't really see how this made top 5. I agree with everybody else, the controls are terrible! I realised that when you have your mouse and keep it close to the plane, you actually fly more accurately, but when you pull it away from over the plane, it gets all laggy and theres a huge delay in change of direction. If you want this to be the controls, make the other planes obey it too. Better yet, just make it faster, and with the keyboard. It's not hard to script keys, if anything, it's easier than script a listener for mouse movement. I thought it was polished and the graphics were quite smooth, but the music was absolutely terrible and so annoying. the sound effects were also quite weak.
Maybe get some people to test your game before you put it up. The interactivity was the shits.