Cell Crawler

This is for TweetTweetJam8 and its 500 character limit: my code contains 495 characters including the html tags and javascript. The name is in reference to cellular automata. The idea is the field is full of cells that keep changing based on a set of rules and you need to get past them to reach the goal. Although I could only fit limited cell types in this version if I revisit it I'll be sure to t…