It is time for you to help Carl restore his head by traveling to different locations and collecting cogs so that he can start his way towards his resurrection. Each level you get to pass through will bring new challenges. You will have to collect cogs and use them to open gates. Sometimes you will have to make certain you get all the cogs so that you can pass through the gate. 

To make this adventure more challenging, it is time to upgrade yourself. You can get a better robot head, a better weapon, or a better shield to increase your chances of success. 

The robots are very useful, but be careful, they can also be very dangerous. The robot head is able to blow the robots to smithereens, which is nice, but be careful that you do not get yourself into a bad situation because of them. If you fail to blow them away, they will come after you.