The Dink Network

Ok maybe I am missing something, But in the very beginning of the game I am stuck. I am pretty sure I have explored that entire cave. I found a robot head, I can see a blue robot. But it is blocked by rocks (that I cannot push) and there is another area with a large rock blocking the path. but I can not get through either blocked path, and just seem to be stuck running around killing the same monsters over and over. Can anyone give me a tip on how to get out of this area please? I'm sure it is something simple. And maybe there is just some area I havent explored but just think I have been everywhere.

thanks in advance.