Ok, so you've heard how Derek Yu's Spelunky is some kind of genius masterwork, but you don't really see how walking thirty pixels and getting killed by a snake ten times in a row is all that fun. The thrill of discovering how to die one way you haven't found before after playing a hundred times is magical, but it's not that fun if you just keep dying the same three ways over and over. So, launch Spelunky (if you can't do that, I'm afraid you need a different guide) and walk your ass into the door that says START.