Objective: Sink a boat into the ravine.
Sounds all nice, except a boat doesn't appear for that mission. At all. And when it does appear, and I sink it, I still fail? Then once I come out of the hole in the rock, a shark eats me. Nice.
Game issues aside, I thought the controls were mediocre, and the physics were off (i.e. when you try and jump a tiny island, you bounce backwards.)