the game is awesome....until u die and have to restart entire levels again and all ur hard work is wasted.who thought of checkpoints???.really bad idea that has stopped me playing this game as often as i would like.try save points.i just cant sit there for hours on end cos i have to complete so many tasks in one go or start from the beginning.very poor game design that makes the game unrewarding.....

there are checkpoints in the game...??
if you press escape you get the option to restart from checkpoint!!
These are in appropriate parts of the game to save people repeating hard stuff again

Rockfall's right. I mean, it took me about 5 tries on Midway to shoot down all the Zeros chasing the B-17s