Um... I started this and the old man gave me a key which unlocked a rock outside his house, but then after that I found a cave that has block in front and a keyhole next to it.
But I didn't seem to find a key anywhere for this door. There is nowhere else to go so maybe a hint or something?
Edit: took a better look around and found a Key behind a tree... Hehe... well onwards
Edited by Benji, 10 June 2014 - 10:17 AM.