I have made it to day two. I am guessing you need graph paper and to make a map for this game to make any sense, but I don't find it interesting enough to go through the effort. Here is what I have found so far:
You can pick up green coconuts, dead fish, you can push the log in the jungle and get a grub, you find a tree with a hole and can stick the stick in it (Mine was not sharpened at the time and I have not found it again), you can look at your watch for the time. (Probably important) If you dive in the shallows you can find a clam or get attacked by a shark. Found multiple pieces of driftwood.
Edit Moderator : thanks using the spoiler button when giving direct cluesI have no idea what to do from this point. I am finding more driftwood and coconuts, I am guessing they random spawn.