Your mission is support Space carrier through the deep space.
Game has three different mission.
Enemy is attacking all the time. You have support fleet which is coming help you 5 sec.
Activate support fleet you need pickup Amor objects.
If you pickup bomb you could destroy all enemies at field.
When you lose your or Space carrier shield, your Space fighter explode.
First field you go normal space
Second field you fight inside planet atmosphere ( You are inside ball and enemy is coming from horizon
In the third field you are in deep Space where all enemies are in different level
Good luck your mission
You find video from game here