No issues running the app. Never crashed on me. Great graphics and idea, but way too Slooooooooooooooooow. 10 minutes to get the flow going. Then it takes about 10 minutes to earn your coins - only 150 of them. It should be a lot quicker to earn coins and upgrade aircraft and airports. To still make money, consider adding pay only airports and plane types or liveries for purchase not available with coins. But let the game progress faster. At this rate I might as well go become a real ATC controller!
Flyinkool about Unmatched Air Traffic Control, v3.5.4