Shortly after the tutorial the arrow keys stopped working for me. I had the map and the spinach. I managed to use the mouse pad and click to move for long enough to get up to the chicken overhead, but then that stopped working also. The up and down arrows could get my little Amelia Pond to shift her stance slightly and that's all. I used the letter keys I could remember and they didn't work at all.
Amelia Pond again. I returned to the game and the arrow keys still don't work. On the other hand, the mouse pad and clicking worked until I tried to climb up the rocks and then it ceased working. I hope this helps! I suspect I won't be able to play until the next time it's available in Beta as I cannot get around right now.
Ameila Pond, I have seen another problem report with Safari 4.1.3 which is what you are using- while that is investigated, can you try with Firefox or Chrome?