Made some minor changes, made an itch page and finished the game.
https://aughckt.itch.io/teuthis94

Made some more visuals and effects

Added the actual gameplay part of the game. Still a bit buggy and could definitely use some polish, but the atmosphere's there.

Still not sure if the game is well designed or actually fun tho.

I'll explain the pieces for those who are interested:

-Flapjack octopus, the leftmost piece at the start of the video.
This is your 'King'. All enemy pieces are attracted towards this one, and if it dies you're done. Has the least amount of movement and can't kill.

-Anglerfish, on the right of the flapjack.
Middle of the road piece. Has decent movement and can kill enemies if placed on them.

-Fish (or flashlightfish), on the right of the angler
Has the most movement, but can't kill. Will switch places with another piece if it lands on a tile with that piece.

-Squid, rightmost piece.
Immovable sniper. Can only be moved if the fish switches places with it. Can only kill enemies in a certain radius. Useless up close, useless if too far.

Modeled some pieces, gave them unique behaviour, and added more audio.
Oh and also a kill-particle effect.

It's starting to look like some chess-puzzle game, which wasn't my original intention, but I'll look into it.

Added tile generation, camera movement and a selection system.