Thats awesome feedback, thank you! First of all, youre right about the notes, they are a nice narrative addition to the game and could definitely be more explored (maybe we thought the game wasnt that obvious to grasp? hahaha)
About the ending, well... I dont wanna spoil it for other people, but what I can say is that the ships sank because the lighthouse actually turned off the light as they approached, not the other way around (as shown at the beginning) ;)
I hope that clarifies a bit!