adventurous mysterious medium-paced

Definitely loved the concept of this more than the execution, as I felt like the actual story was a bit of a slog in places. But some components of the world building were just so fun, and made me want to run a D&D campaign set on the train!
adventurous mysterious tense fast-paced
Plot or Character Driven: A mix
Strong character development: Yes
Loveable characters: Yes
Diverse cast of characters: Yes
Flaws of characters a main focus: N/A
adventurous mysterious medium-paced
Plot or Character Driven: A mix
Strong character development: Yes
Loveable characters: Yes
adventurous dark emotional mysterious medium-paced
Plot or Character Driven: Character
Strong character development: No
Loveable characters: Yes
Diverse cast of characters: Yes
Flaws of characters a main focus: Complicated

I really liked the writing, the storyline and plot, and the characters felt well fleshed out. My problem was part of the story of the Wastelands,
which becomes a fantasy narrative, but with no explanation of how the world worked. How did the plants grow on the train? If the trees weren't dangerous in some way, why was the sap like blood? What of the many monsters that dwelled in the Wastelands who took your memories and warped your reality, luring you into giant spiderwebs to eat you?
It felt like the author really wanted the reader to feel affinity with the Wastelands and the characters from it, but did none of the work to make it a likeable place.
adventurous mysterious sad tense medium-paced
Plot or Character Driven: Plot
Strong character development: Complicated
Loveable characters: No
Flaws of characters a main focus: Yes
adventurous mysterious medium-paced
Plot or Character Driven: A mix
Strong character development: Complicated
Loveable characters: No
Diverse cast of characters: Yes
Flaws of characters a main focus: No
adventurous emotional hopeful lighthearted mysterious reflective fast-paced
Plot or Character Driven: A mix
Strong character development: Yes
Loveable characters: Yes
Diverse cast of characters: Yes
Flaws of characters a main focus: No
adventurous dark mysterious medium-paced
adventurous mysterious tense medium-paced