The game keeps track of your performance. In this case I can see that I only found 2 out of 7 possible power-ups (extra weapons etc) - which gives me an incentive to try the mission again.







Regarding those powerups - it's a good idea to set the sound mix in such a way that you can actually hear your on-board-robot co-pilot... as he explains what is going on. With all the pounding German techno-pop and explosions I totally missed his helpful hints the first time around.

You also score bonuses for "tricks" such as flying through open hangars.