You receive a bounty for each kidnapped human, which can then be used to buy upgrades for your ship, or save to earn interest.

Kidnap the minimum number of humans required to complete the level in the allocated time period.

You must move above the humans (within a set distance) to beam them up to the ship.  The speed of beaming is affected by the upgrades you buy during the game.

Avoid detection from radar stations and avoid being hit my missiles (guided and non-guided).  Don't fly too close to the planet surface, unless you like to crash. 

If you are seriously damaged by missile attack, you can fly to your mothership (outer-space area) to recharge your shield… if you have time! CONTROLS
Mouse to move.

Left mouse button to beam humans to your ship.

Good luck, and good hunting.