Take off not possible

I have an iPad 2. The game makes a lot of fun. You have a realistic atmosphere. I am in the very last stage ("The Challenge"), unfortunately I cant take-off the airplanes. I touch them, try to move them but they wouldnt move. This bug has to be fixed. Thats why only 3 stars from me for the game, otherwise I would give 5 starrs.

Fair Evaluator about Take Control of the Tower, v1.4.0