The game is really well done! I personally am a big fan of PT style games where things change as you walk through, some some domino action and changes based off the player's action, and it just becomes a great game.
And this doesn't disappoint at all! It is very well crafted and in order to see more, the player has to explore the room and go through everything and try out different combination of changes in order to try to get a different ending or a different room from the previous play.
The art style I thought was very effective and added an air of mystery and really went well with the gritty, Lovecraftian theme of everything as well as the mysterious theme of the whole game. It had that old type vibe to it.
The things in the lighthouse were all very interesting and very unique to each other and it was a really well crafted theme and environment!
I didn't get all the endings in the video, but it was fun to go through the game and see things that would snowball into the ending slowly. Did play it a bit after and it was really very cool and well done!
Only suggestion is to maybe add a little hint in the ending acquirement setting to give the player a little idea on how to get the ending they want.
Other than that, it was a really well made game and loved playing it!