I would like you to put in the game the islands in which you can find more survival elements (wood, leaves for the ropes, etc.) and also it would be good that somehow they can create something that makes it possible to control the raft.
Here is my suggestion,
Here's a demo video with most of the things I listed below :)
https://www.youtube.com/watch?v=0lYnblP4jxI
1 # Pirates, when creating the pirate flag altomatically starts a count, when finishing the count the pirates attack your raft, then you must prepare the maximum to receive the attack and survive.
2 # Solar energy and oil, these 2 can serve to supply defenses weapons or boats, "remote control boats that watch over pirates."
3 # Water Bench, where you put 10 cans to refill and refill with empty cans.
4 # Increase the number of items you can hold from 10 to 15.
5 # System of cold rain and heat.
6 # Night and day system.
7 # Sleep.
8 # Fishing more difficult, water more time to be ready.
9 # Other types of shark, differentiated by size and color, more dangerous and more damage to buildings.
10 # Walls serve as a foundation.
11 # Shark wires.
I feel like this game would be fun with maybe some eventual multiplayer.
Some weather, temperatures, and day/night cycles would be great. A way to become to hot or freeze because it's too cold. Maybe a bed so you could sleep.
Some way to make the game more difficult, because after a little bit of playing it, you've got everything you need and you're basically living in a mansion.
Maybe some more wildlife perhaps? A fishing net? Maybe even a way to dive down into the ocean and do something. Perhaps ... a way that you could even be rescued if you build a signal or something in time, like a way to beat the game type thing.
And I feel like the biggest thing this game NEEDS, is more resolution. I can barely see anything on the resolution I have to play it on.
Add something among the lines of a research station used to discover more advanced items such as reinforced steel foundations and upgraded versions of existing items.
Add a shark attacking sound effect and make shark attacks far more frequent to balance game.
Multiplayer would obviously be awesome but I would expect a feature like that to at least be in the far, far future.
Some type of ship wreck that spawns rarely where you can discover new "modern" recipes to craft using the research station to firstly find the recipe that you use to craft it.
It would be cool if on the main menu the raft in the background was your actual raft on which ever saved game you are selecting.
A quick transfer button which innstantly moves items from hot bar to inventory and vice versa as well as from chest to inventory and vice versa would be awesome.
A day night and weather system.
Also please nerf the fishing and potato growing systems because getting food right now is far too easy as well as make tools wear down needing you to build new ones.