For me personally, I think your Main Theme is the weakest one, which was still really good! I just love the feel of both a lot more. It just feels like a fun song! I've never played a Layton game, but your main theme is pretty much how I imagine it sounding. I don't really have much to say about this song other than it was good and I enjoyed listening to it.
I think you really nailed the atmosphere on your other two songs! Exploring the Glimmerwood feels super chill, but at the same time very mysterious and in some places borderline creepy. I love all the little details like the bells and choirs you added. Such a cool track!
Devising a Stratagem is by far my favorite of these three. This feels like the kind of song I would throw on in the background just to vibe to. I absolutely LOVE your B section melody. It's the kind of melody that will get stuck in my head for quite a while.
Incredible work!