A very interesting game! I've never seen anything like it. How did you get the car to move from left to right as the reader clicks through?
The game is made with Ink and Atrament.
Ink is inkle's scripting language for writing interactive narrative: https://github.com/inkle/ink
Atrament is my wrapper for Ink, written in JavaScript (UI part uses Preact for rendering): https://github.com/technix/atrament-ui
Having all power of JS at hands, you can do whatever you want :)