Click the aircraft to get Airplanes and EXP. Click the Sell All button to turn the Airplanes into cash. Buy the upgrade to add a modifier. It's description tells what it does. Buy the factory to get automatic airplanes and EXP. EXP and cash gained from selling depends on aircraft level and modifiers. EXP automatically levels up your plane.
Remember, this game is very early in development, so please leave feedback! Current and previous version changes below: VERSION 1.3 CHANGES - Added more upgrades VERSION 1.2 CHANGES - Added Airplane painting service
