BTW, even if you for some reason have no interest playing the game, you should download the soundtrack of the year:
http://www.cavestory.org/downloads/soundtrack.zip
This Cave Story soundtrack includes all music and sound effects. Most sounjd like some long lost 8-bit game, and even occasionally matches classic soundtracks like Journey to Silius and Mega Man 2. No kidding. I would reccomend the s oundtrack to lovers of music, period. Melodically brilliant. I played for a friend who had no interest in playing the game and he changed his mind when he heard the sondtrack. 42mb.