Heyy!! Here's the walkthrough if you didn't feel like downloading the game (Comes with credits and walkthrough (: )

MAJOR SPOILERS TO THE GAME!!!!!!!!

WALKTHROUGH:

SAVE OFTEN :3

After the intro, collect seashell(s) if you'd like. (Blue sparkle spots)

Head down/south to the village

head to the far left house, enter for an auto scene.

after house scene with mother, head back to the beach on the right.

After auto event with Theo, enter the boat.

Hatch code: 3486

Read the sparkle spot, then head back to the door up top. After escaping the boat, head back home/inside house.

After bar scene, head to the beach again

On the beach, head right- there's an opening available to the rest of the beach.

Go right.

After another scene, head left to the shack on the beach.

In the shack, interact with the bookcase upstairs. Afterwards, choose the bed to hide in/under.

Go back downstairs in the shack, and try to leave.

When in the boat, go up.

Keep going up, after the shore.

Enter the cove

Touch the area near the arrows to go in the water

You cannot progress to the lower section of the underwater segment till you get an item in the upper segment first.

After getting the item, and after reading the sign to the left, go back down.

Interact with the wall/glowing circle for another scene.

After the scene, head to the right and another scene will play.

In the water again, take the lower route.

In the cove, interact with the sign/glowing circle.

Go to the right.

In the water again...again, go UP.

In the cavern, interact with the pillar. (If you haven't gotten any seashells before now, grab the seashell, the blue sparkles, and interact with the pillar again.)

In the inventory (X or Left Mouse Button), choose the Sacrifical Dagger (Using Z/ENTER/SPACEBAR)

after the scene, go up.

Once on the beach again, go down.

After the Mariner speaks, HOLD SHIFT AND GO UP/NORTH!!

That's it! :3