Along that biscuit train

1. ⤓ A quick smoke.
2. ⤓ After the sun.
3. ⤓ Flatland city.
4. ⤓ Endless heat of summer.
5. ⤓ Uncle Fester's secret room.
6. ⤓ Why didn't you?.
7. ⤓ Alfredo valley.
8. ⤓ Cuddle muffin.
9. ⤓ Long odds.
10. ⤓ The sky looks wrong.
11. ⤓ The world has moved on.
12. ⤓ I have died.
13. ⤓ Ferd Mertz.
14. ⤓ Ballad of the angry foot.
15. ⤓ Close to a nightmare.
16. ⤓ Feed me stars.
17. ⤓ Along the biscuit train.
18. ⤓ Fail.

Mystery X