You need ten planks for a raft, and I think it is possible but you have to deal with the risk of being more daring with the sharks. The 1-to-9 positions in fishing are fixed and I made no effort at changing it, however I restored an original feature of the game that was missing from the 1985 version: the fishes now swim at different depths so even though the game doesn't really try to deceive you, your perception of left-right is thrown off a bit by the small difference of depth.