You were completely alone at this area until now. These robots are heading your direction and it seems like their intentions are not good. Shoot them with your cannon and switch between weapons to collect bonuses and win the level.
Imagine a situation when you are completely alone tight in the middle of the location and various robots are trying to get you. Is that enough terrifying? Test your ability to choose the right target and shoot them all before they come too close. When the timer runs out of time, your enemies will become stronger and their quantity will increase. How long can you resist them?