Break enough things to proceed to the next level. Aim and fire with the MOUSE. Position the mouse further from the cannon to increase shot power. Aim strategically and for higher value targets.
Attract the smaller spheres and guide them safely to the light blue sphere. The spheres should not touch red surfaces. Left click to activate/deactivate the attraction mechanism. You will only attract spheres if you are close enough.
Defend the main building from incoming enemy units. The enemy will try the approach from different sides, so you must ensure that your defenses do not leave room for any units to slip past.
Stay airborne for as long as you can without hitting anything. Press space to activate the booster. This will guide you aircraft up. Release it to go down again.
Try to get the customers to spend as much money as possible. Make sure to reach the goal after the given number of days. Build shops at the designated locations and try to stall the customers outside if your shops are full. Use the money you make on more shops and upgrades.