Okay, so having to set the position of the catapult every time I load during the Scenario mode is annoying, but having to reset the position of the catapult AND having to reassign my 60 skill points in Crossfire even if I use the retry button is just plain annoying.
I probably would have rated this game very highly despite some elements of luck if losing a level to bad luck would not force the player to go through the motions again and again.
After all the original idea of the game play, the nice graphics and sound means that the game is really enjoyable - as long as you never have to restart at any point.
A great and innovative shooter. It gets really hectic later on, but isn't unfair. Though lucky placement of the autoturrets can make your life a lot easier.