Aliens in the Garden

You need to help the people of the far galaxies that landed on our planet because of engine failure. To repair the spaceship, you need a lot of energy. It can be collected, if you destroy the bugs that inhabit this meadow. Point to a flying robot insect accumulation place and make sure that they have not penetrated to the ship. After each insect remains energetic clot that collects in a special container robot - Assistant.