loving all of your games from the cute pixel art to the difficulty
i was smiling every time I died
Add animals you can tame such as seals and small squids. The seals and squid would be tamed with fish. The animals would have an ability. The squid would be able to bring resources from the ocean floor the more squids you have the bigger items you can get. Squid would be able to bring small clumps of sand, scrap metal, rock, coral and other junk. Seals would be able to defend the raft and hunt tuna for you the player to eat.
Also allow the player to get palm oil from palm seeds for something.(I always have a chest full of palm seeds)
instead of islands why not have other rafts. The other rafts could have people in them or have the raft as a wreck which you can loot for resources. The rafts with people you can either attack,offer resources or ignore them. If you attack you can loot their raft and attach their raft to your own. If you offer resources you can either trade or befriend them. If you befriend them they will join you,your and their raft will attach. With this the goal of the game will be two things. Unite the rafters all into one raft or conquer the other rafters to become the strongest rafter.