Events That Could Be Added:
Ocean Storm (heavy rain and rough ocean)
High Tide (flood)
Migrating Sharks (Sharks Attack)
Hot Waters (appearance of huge whales , whales can destroy some parts of your raft)
Tropical Cyclone (appearance of a huge nearby cyclone with strong winds, can be pulled)
Water Trunk (smaller and less devastating than the cyclone can pull a lot of water)
Mysterious Day (strange things happen around, UFOs, ness monster or bloop, a loud noise picked up from a huge mysterious creature)
Fish Migration (can attract various creatures like fish, dolphins, swordfish, and you can collect lots of food during the period)
Polluted Ocean (various garbage appears, and you will not be able to drink the water during the period, but you may collect lots of materials)
Pirate Attack (several pirate ships appear, rarely can they shoot or stop and descend on their raft to steal some items, their goal and defeat them with the spear if they descend)
Ocean Mist (low visibility through mist)
Polar Shells (they appear to be able to collide with your raft, you can collect the ice, and make fresh water)
Swirls (various swirls appear, if dropped in water will be pulled by some swirls, you may die or lose some items if you survive)
Frozen Ocean (some parts around you may freeze, you can walk on the frozen water)
Water Mines (some explosive mines appear floating in the water, exploding on your raft (a small explosion that will break one or four woods) and leaning against it may explode and kill)
Toxic waters (you can not enter or drink the water during the period)
Items That Could Be Added:
Harpoon (you can hunt sharks)
Fishing Net (you can catch several fish at one time)
Fishing Cage (you can catch several crabs or lobsters)
Bow and Arrow (you can shoot sharks or birds)
Backpack (a second inventory, you can put more items)
Fruits (fruits that can come from barrels or come in the form of seed to be planted)
Bait (to attract the shark)
Bucket and Barrel (may contain liquids)
Things That Could Be Fixed:
More Space On Chests (increase the amount of slot in chests)
Construction Conflicts (take away some unnecessary conflicts to build freely)
OBS: this is just an idea of things can be added =)