http://forums.tigsource.com/index.php?topic=4017.0 This game is awesome.

Spelunky is not like your average game, there are no tricks to beating it, you can't google the answers to a puzzle, why? the levels are randomly generated, and perhaps most brutally: dying is for real, if you die it's game over. go back to the beginning. I'm not going to lie. This game is the hardest game I have ever played, but it is AWESOME! Be it that maany items have no explanation as to what they do, or the many clever ways of getting around each obstacle, or even that if you try to steal from a shopkepeer he CHASES YOU ACROSS THE LEVEL WITH AN INSTANT KILL SHOTGUN. this game is an awesome good time, also it is free :3
also I found it on the escapist from the article on it.

This Game is Great, but very difficult

This game is full of awesomesauce.