I only just stumbled upon this demo, perhaps thanks to the recent update, and I had an absolute blast wrapping my head around the puzzles and enjoying the (relative) peace and serenity of the areas I got to explore.
The learning curve isn't too steep, and you get nicely eased into the gameplay. It's just a lovely, relaxing exploration and lateral thinking game.
Oh, and I couldn't possibly wrap up a review of the demo without mentioning the lore! There's so much story in the background here, and it really sets up what will no doubt be a great gaming experience!
I'll no doubt be checking out the full version when I get the chance, and I recommend everyone give this demo a whirl to see if you wanna do the same =)