Yesterday, while cleaning up my media center, I found my copy of Ratchet & Clank: Into The Nexus, which I bought sometime before Christmas last year. I had been pretty excited about this game pre-release, what with it being the first "traditional", albeit shorter than usual,...
Go for the Space Tiffin on every level, for you'll get extra points and a power boost.
Focus on the green and red blobs - those are the ones you need to kill to finish the level.
You can shoot the triangular walls that get in your way.