Level 34 was only moderate for me. If you are having trouble, I suggest taking some planets about to enter orbit around a defense platform and then take the turret. Then just continue to survive and keep as many planets as possible. Let the AI kill off the enemy if possible.
 "Solarmax 2"){kind=icon}
 "SPACEPLAN Prototype"){kind=icon}
 "Strike Force Heroes 2"){kind=icon}
 "Transformice"){kind=icon}