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book/src/side_projects/santa.md

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+# 15 minute Santa
+
+Logo?
+
+Created by [Dustin Carlino](https://abstreet.org), [Yuwen Li](yuwen-li.com), &
+[Michael Kirk](https://michaelkirk.github.io/)
+
+- Play online (slower and no music -- download below if possible)
+- Windows
+- Mac
+- Linux
+
+15 minute Santa is a game where you deliver presents across Seattle. You earn
+more points delivering to high-density housing, and you need to refuel from
+shops, so you'll have to understand where people live in relation to where they
+work and shop.
+
+Contact <dabreegster@gmail.com> with any feedback or
+[file an issue on Github](https://github.com/dabreegster/abstreet/issues/new).
+
+## FAQ
+
+### Why did y'all make this?
+
+We normally work on [A/B Street](https://abstreet.org), a traffic simulation
+that lets the general public explore a future prioritizing more sustainable
+modes of transportation. All of the recent
+[talk](https://crosscut.com/focus/2020/11/seattle-could-become-next-15-minute-city)
+about 15 minute cities prompted us to explore how Seattle's zoning causes many
+people to live far from where they get groceries. After experimenting with a
+[more serious](fifteen_min.md) tool to understand walk-sheds, we decided to
+spend a few weeks on something a bit more light-hearted.
+
+### Realism
+
+The map of Seattle and location of shops comes from
+[OpenStreetMap](https://www.openstreetmap.org/about). We only consider shops if
+they sell food or drinks -- let us know if the map seems to be missing your
+favorite restaurant. The number of housing units is based on
+[Seattle GIS data](https://data-seattlecitygis.opendata.arcgis.com/datasets/current-land-use-zoning-detail).
+Mixed-use buildings with both commercial and residential units aren't
+represented. The game lets you upzone any house to place a new store; obviously
+this is a vast simplification of how complex a real conversation about changing
+zoning codes should be.
+
+We rigorously evaluated the speed and carrying capacity of different cargo bikes
+and sleighs on the market to tune the vehicles in the game.
+
+### Modding the game
+
+You can adjust the difficulty of the levels or give yourself all the upzoning
+power you want by editing `data/player/santa.json`. If you break something, just
+delete the file to start over. If you come up with a better gameplay
+progression, please share -- tuning a game is hard!
+
+### Adding new maps
+
+Missing your slice of Seattle, or want to run somewhere else? If you have a bit
+of technical experience,
+[follow this guide](https://dabreegster.github.io/abstreet/howto/new_city.html).
+Otherwise, draw the map boundaries in [http://geojson.io] and
+[send it to us](https://github.com/dabreegster/abstreet/issues/new) along with a
+time limit, goal, and starting point on the map.