I think it needs more new craft. We can move with small boats, archery, clothing increased resistance on underwater shark attack, ...
- Add some recipes and ecosystems such as birds, fish, or using tools such as fishing nets ...
- Add Day and night.
- Some of the oasis, the boat sank, (if there is a mini map and small boats). The idea caught on the island animals and new food?
+ Can not live on the island - tide if there day and night (logic xD).
Sorry for my English is not good. I am French :((