Hello, first off. I have to say, for a simple free game this is amazing and I am already in love. I can't wait to see where this game goes and have marked the download page as a favorite to check back for updates. I hope they come often.
-Lifemaul
Suggestions:
Multiplayer Support
Would be nice to play with friends, if some of the other features would be added.
Seagulls (For hunting/eggs see below)
Hunting birds with a bow would be nice, maybe add that you can collect eggs from them and build bird cages, you could even have areas that you could release the birds in "cages/rooms" which would give the birds a place to nest/provide the player with more eggs for raising their own birds.
Aquarium/Tank Space
I would suggest this space be something similar to the "Nets" that capture floating items in the water. If you were to say combine 8 nets you could place something in a 6 block space that would store live fish. This way you would be able to breed them rather than catching them.
Bow and Arrows
Simple weapon used for hunting or fending off a shark attack from a safe distance, without having to bother to run all the way to the shark attack.
Spear/Harpoon
The idea would be to give an alternative to using a fishing rod. Maybe add swordfish or marlin for spear fishing that you have to see and either chase in a row boat (see below for boat details) or wait for it to come close enough to your raft.
Hunting - Sharks, seagulls, whales?
I would love to be able to use a small pistol, or even a rifle, but the bow will work fine if added that would be used for shooting birds, sharks, or maybe even whales.
Row Boat - Something to chase your prey, sharks, whales, birds, or maybe even pirates.
2nd Line of defence should you need to abandon ship. I would suggest the rowboat can be tied to the original raft in the event of a pirate attack, shark negligence, or maybe simply because you want to start over. Maybe even give the row boat a little storage space just in case you need to abandon ship.
Reduce thirst use, please.
it just seems you die of thirst rather quickly and it gets REALLY annoying to constantly be turning salt water into drinking water.
Pirates
Without anything else attacking you save the shark, the game rather gets boring rather quickly. Adding pirates who could be simply based on the size of your raft would be awesome, small raft, means small pirate ship. Big raft, means big pirate ship. The pirates would board your raft, destroy your items, as well as come after you. Killing pirates yields loot, as well as new items/weapons. Capturing a pirate ship would mean a back up to your raft, but would be near impossible without the proper weapons... and maybe some friends.
Fellow Stranded Sailors
Help them aboard, hold them hostage, or simply share your supplies with the handy help. Plucking people from the ocean gives you a friend, prisoner, or slave. Their fate is in your hands. Arm them and let them help you fight the pirates or gear them and make them collect supplies.