The MTCs have been hosting really great themes lately, so kudos to you haenry!
And for those who are unsure about this challenge -that's precisely why you should try it. I would especially encourage new/average experienced authors to at least build something top try it out, because this theme puts extra weight on a very useful mapmaking skill: diagonal mapping. Creating maps with diagonal drive paths is almost always more interesting and could be the subtle thing that turns "good" into "great".