I agree with danpost and MatheMagician, but I have another tip: improve the smoke the airplane 'drops': it isn't at the right place and when the plane is going down, the smoke is also going straight down. It should go like this: \ \ \ but with an angle of 45 degrees, since you're also moving forward.

@freed if you ever complain about a game again, make sure your English is right: "who COULD even think OF creating a game so ugly and DISCUSTING". And, what's so ugly? Can you do something better?

Thanks, I'll look at it. I also have to make it less intensive, but I don't know how at this moment... I'll post an update soon!