Hi!
Wow, first of all, congrats for the fact of being able to making the deadline. You chewed on a big bone, because doing a Subnautica clone is not an easy task!
I suggest, for your next project, to spend time on polish. There's so many features in your game, but they feel somewhat unpolished. I had difficulty to attack the small fish, I gameovered without knowing why, etc. I know survival is key to Subnautica, but I feel the inclusion of these mechanics in your game really hindered the fun, unfortunately.
There's a lot of effort that have been put in this game, it shows! Thanks for submitting!