Surprisingly easy
Well, to be honest I'm not an adventure fan and practically always needed a walkthrough for adventure games. After reading so much about how hard this game is I was pretty sure that I would be fucked - especially when I noticed that the walkthrough button mentioned in the comments isn't there (I'm still wondering why). But after figuring out that you can use objects from your inventory with other objects in the inventory I actually solved the game in two minutes. I'm really wondering what's supposed to be so hard about it.
Anyhow, I like the game a lot, the graphics are beautiful, the gamedesign great and the plot truly mysterious. Now I'm going for episode 2.