Main Menu is nice. Gives of a comfy Feeling. Kind of wish Background was interactable tho. No new Levels is disappointing.
Why are the Footprints red? Why is there no Portrait of Dad or whoever the hot Guy is, telling his Kids the initial Story of the Thief? Only pops in after the Explanation is all done. Camera rotates weirdly underneath the Dioramha when transfering from the Truck-view to the Cabin-view.
Nice that everyone gets so into Character, even the Kids put on some Costumes to solve a little Dioramha Crimescene with their Dad in the Evening near the Fire on a cold and snowy Day while warming up in their Cabin. (I don't care if non of that is explicitly said or told.)
Bo is a stupid Name.
Nice that you fixed the clipping and backface Issues, nice that you have a background and everything, nice that you can zoom into interesting Pieces. Not nice that the Dioramha is so empty looking, could use some more generic Scenery, maybe a rock or two, maybe a Tree. How about some Firewood next to the Cabin, and a slightly more interesting Shape? Slightly angle the Car maybe? I think I recall them talking about a River, maybe a bit of that aswell? Also a bit of Shaderwork to make the whole Thing look like Dad built it one Evening to entertain his Kids, instead of so 'realistic'. More like an actual Toy Dioramha. Als the Road kind of is flat and floats above the Snow, pretty immersion breaking.
The little walking "Animation" is adorable. Don't know if a slight wobble would make it better, but maybe worth a Try. Thief-Peeps mask is visible from the Back, you have some normal-issues there. Also the mask could be enlarged with a slightly more exaggerated Shape I think. But that might also just be wrong.
Clicking the Tire in the Questions can be a bit finnicky, why can't I rotate and zoom the Dioramha there?
Can't say more, theres no more Riddles to solve. Boo.