30 minutes in and my mapping skills have been dusted off.

Éalú means escape in the Irish language, something I didn't know but which makes sense even this short time in. I am clearly in a maze, and I assume the objective is to escape. Or to find the way out/get to the end etc., which amounts to the same thing.

You are piloting a little wooden mouse, moving from room to room. Some rooms are just connective tissue, some contain puzzles, others contain clues and some deal death. Closed doors suggest a puzzle solve is required, and the clues need to be intuitively connected to the relevant puzzle. That hasn't been hard to date, but I say that only being two puzzles in and with my maze exploration still rather limited.

The whole game is stop-motion animation, and apart from accessing the menu you only need the mouse. Don't be confused by the default cursor being an arrow (I was); the active cursor is a white circle and clicking and briefly holding will cause the mouse to interact with the relevant hotspot. This might be to e.g., enter a door, or to poke a switch or to twist a lever.

You can't save manually, but exiting to the menu seems to generate the ability to pick up where you left off. I will experiment a bit more with that as I go. I have also died once, which reset me back to my starting 'home', and the only puzzle I had done needed to be done again. Which if it holds true for the rest of the game means that taking notes about your solutions is something you should do. In conjunction with actively mapping the maze, it should ensure a relatively quick access back to where you met your demise.

I did note too that having died, a little image appeared on the wall of my home room, a reminder of what not to play with. It wasn't entering the particular room that did me in, but inquisitively interacting with something in the room. Should I encounter that object again I will leave well enough alone.

The music isn't really doing it for me, so I have turned it right down. Which as you know I tend to do anyway.

The rest of the maze beckons.

Thanks for all of that helpful information, flotsam! Thank you, Drac!

Just to clarify, having started the game again this morning, I was able to load where I had got to in terms of puzzles completed, but I began at the home room.
The wall contains details of eg my deaths, and a quick check reveals my solved puzzles remain solved.