great game idea, but...
...this game needs a few fixes. The problem with the stalling is already mentioned. The general flight physics are a bit off. Also I'm not sure where you use that many system recources, a game like this should be able to run on my mobile.
last, there is a serious problem with the paratrooper mission. as you don't control the plane once you ejected, it is completely impossible to get it safe to the airport (up key still controls engine) My suggestion would be to just 'forget' the plane and check on the landing spot of the pilot.
with a little more work this can be a great and unique game!