This shows a lot of promise. While clearly unfinished, this has the structure of something outside the scope of a short jam game.
A few things that need to be added (to the extent that these are obvious, forgive me, better safe than sorry):
1. More sound effects, and some music.
2. A better sprite for the player, depicting a character swimming (and pointing in at least 4 directions).
3. More hazards (scary fish?).
4. More features to explore (different types of resources? optional goals?).
Overall, very impressive for a first jam.