When bombing with a Stuka, fly at an altitude of 5 feet above the ground with your landing gear out (to prevent crashing), and just when you're about to crash into your target, drop your bombs, pull back on the mouse or joystick and raise your gear. You should have destroyed your target.
This sound difficult, but once you get the hang of it, it's fun !
Cheat codes sea hawk = long life since this time is final day of enemys
fastfire = rapid fire enter in gameplay
byby = seeking missles enter in gameplay
firefest = long rang flamethrower enter in gameplay