You are the "@" in the upper corner. Use W,A,S,D to move. You can move through "." and "," but not through"E". If when you move you would have landed on an "L" you lose. You can still occupy a space with an "L". Try to reach the "G". Also the map loops.

Also check out the original colorless version I made for TweetTweetJam8 using 495 character (It has more words): https://ninjakittyc4.itch.io/cell-crawler