I bought this game today. I was disappointed to see the keyboard movement, but I gt a tip from the JA forum that you can program your mouse buttons to the 'w' key. Now I'm using just the mouse to move.
I've toured the island a bit. I'm so excited to have a virtual environment to explore, I almost don't care if there is anything to do. I'm going to play this when I have enough time to make notes and maps. It's been so long since I've played a new Myst inspired game.