The point and click style through the sewers was really interesting. The guy Peter Griffin falling was really a really funny touch. I assume you all used stock imagery for the sewers, but I would be interested to know if that is not true.
Towards the end the number of parasites that would spawn was kind of insane until I realized that I just had to sprint to the end. I'm curious if there were other endings I missed as well. This seems like the kind of game that might have them, but it was a really good experience overall.