I agree with a lot of your suggestions. I feel like the shark eating the middle of the raft HAS TO GO! The shark should only eat the edges of a raft. I also think a Zip line would be really fun to add as well as an upgraded axe. Fall damage will most likely be added in the future, for realism, and I hope they do add it for the games sake. Lastly, A boss fight would be pretty cool to see, it can get pretty boring just fighting sharks and birds. Plus 1 from me!