A lot has been added to the game for the final release. I listed all the defaults of the game and fixed them. I improved the building system to make it more intuitive, improved the global balance difficulty (mainly with the Kraken), added "steps" to cliffs so you don't need anymore the underwater scooter to go exploring, more variety in the world, all the workshop tables have been redesigned, more sea life has been brought (now there are tunas, dolphins, the great hammerhead and the great white shark). Many new features including finding and fixing droids so they can help you out by carrying items and protecting you. Also there are now gold chests you can find in the world. They give you coins you can use in Sandbox mode to buy equipment before launching a new game. Graphics have been improved, including the caustics effect.
Here is the Steam page: Store.steampowered.com
Have a look, and don't be afraid to dive into the depths ;-)