UPDATE: Added Levels feature.

Heh, round corner characters for box drawing were there all along.

This game is named sausage as a tribute to BlackAdder S03E02: Ink and Incapability:

Renowned writer and lexicographer Dr. Samuel Johnson starts to read a tiny scrap of paper containing Baldrick’s miniscule novel:

Once upon a time, there was a lovely little sausage called…

…only to realize that after 18 years of arduous work, he failed to include the word SAUSAGE in his magnum opus.