You can destroy enemy Square Planes by tapping them with your finger or by tapping your own aircraft to fire rockets at them.
Pick up a supply box to add to your arsenal of weapons - these are fired by tapping your own plane.
Avoid the obstacles, some of which you can destroy by firing rockets at them.
This is the vLite (trial) version of Square Plane: Square Force One, which can be downloaded from:
Square Plane vLite is a part of the Square Craft series by Das Telefon.