I wanna be the guy
http://kayin.pyoko.org/iwbtg/ <-official site
http://en.wikipedia.org/wiki/I_wanna_be_the_guy <-wiki
I suggest getting the demo first, because the game takes foreeeeeeeeeever to download and you most likely won't get past the first few obstacles.
I'm not sure if this is old, if it is I'm sure I'll hear about it fairly soon from you guys, but other than that I thought you guys might think it's interesting. This is so incredibly effing hard, I can't get past the part with the clouds after going through the trees with the falling apples. And it's hard to find a strategy on dodging a wall of spikes going straight towards you.
And yet, I find myself coming back to play it, because... well... I wanna be the guy!