It's got great music, like Child of Light. No silly limericks in the game. Puzzles are pretty simple. It has a lot of information about WW1. You unlock "Facts" and it shows some photos from back then, and a bunch of collectables in the level that describe trinkets that were from back then.
I marathoned it on Twitch, I'd say it only took me about 4-5 hours.
And since you're probably thinking about it
spoiler (click to show/hide)
The dog doesn't die