Good game
I finally beat the game. Some of those missions are really frustrating, esp. the bomber escort mission.
I agree with previous reviewers... An upgrade system would be nice, continues after every level instead of every 5/6 levels.
The game play is fluid and fun. One thing that really bothered me was the bomber intercept missions, the screen scrolled with the bombers... But if I slowed down any to dogfight the fighters, more often than not I'd end up off the screen and it was difficult to tell where I was.
SPOILER / CHEAT / BUG???
On many (not all) of the levels, if you move to the far left, the fighters don't shoot at you any more.