Day 12 - Daily New Puzzle

A dozen of days!

I'm super happy with my puzzle today!
Also, thanks to my girlfriend I spotted an error just before uploading the puzzle here.
Honestly, I started planning a much bigger and complicated "sharkzzle" for today, but I ended up settling for a simpler one because I didn't have the time to fully test the full one.

Also, one of my colleagues today suggested some fun mechanics to implement, so I'm defnetely revisiting this game at some point after this challenge.