OMFG Thanks so much for the video review! I did do it all solo but used a few assets from a couple of different places - kenney.nl for the initial taxi, road tiles and people models, plus music that I already owned and some sound effects from a free site. All the buildings and trees etc I made using Asset Forge, and obviously all code and UI etc was all me.
I'm so pleased to watch someone else play it as its really interesting to see how people interpret the challenge... There is a timer for each level, which fills the gauge in the top-right. The blue bit around this is the fuel level and the fare counter sits within it. The 4/3 bug thing is something I found after submission (typical), but will fix for the next release :)
Sorry for posting this in the video and here, but thought that I should clarify to others too!