The third level like.. level 3 or... The ICE LEVEL which I've only seen twice.
And yeah, Power. It's sort of a Nethack platformer. So the levels are randomly generated, and there ARE a LOT of ways to die. It's quite hard. But I think because the levels are random, the guy has put a lot of effort into making the rest of the game really interesting. There's loads of stuff in it that I don't fully understand. It's very cool, I think. Lots of weird items, creatures, I try not to look too hard at the wiki, but there's some stuff in there that I haven't managed to unlock.
It replicates that feeling that I had when I first started playing computer games when I was a child, and I didn't really understand them. And because progress is so difficult, finding something new is genuinely quite exciting.
The feeling of having a bunch of cool items and then getting iced though.. normally by something dumb... annoying.
RECOMMENDED.
http://www.spelunkyworld.com/