You must play through to get to the song that plays during the end credits. Trust us, it's worth it (and we're pretty sure you'll be able to beat the boss).
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.