update README

README.md

@@ -2,7 +2,7 @@
 Mathsteroids is a game based on asteroids that can be played on a selection of interesting mathematical surfaces.
 Press `A` and `D` to steer the ship left and right, `W` to move forwards and `K` to fire. Destroy the asteroids to win points.
 
-You can play mathsteroids at [mscroggs.co.uk/mathsteroids](http://www.mscroggs.co.uk/mathsteroids).
+You can play Mathsteroids at [mscroggs.co.uk/mathsteroids](http://www.mscroggs.co.uk/mathsteroids).
 
 ## Surfaces
 The following surfaces are currently available:
@@ -48,7 +48,7 @@ The following surfaces are currently available:
     * Poincare disk model
     * Beltrami-Klein model
 
-# Config.json
+# `config.json`
 Mathsteroids can be configured by setting values in a file called `config.json`
 (see [`config.json.template`](config.json.template)). The following entries can be set
 in the configuration JSON:
@@ -66,3 +66,57 @@ in the configuration JSON:
 | `"debug"`                | `true`, `false`      | `false`            | Toggles the visibility of debug information |
 | `"sound"`                | `true`, `false`      | `false`            | Toggles sound |
 | `"sound-dir"`            | Any string           | `"sounds/default"` | Sets the directory where the sound files are located |
+
+## Example configurations
+
+The version of Mathsteroids available at [mscroggs.co.uk/mathsteroids](http://www.mscroggs.co.uk/mathsteroids)
+uses the following config:
+
+```
+{
+    "high-scores": false,
+    "controller": "none",
+    "game-mode": "lives",
+    "pre-html": "",
+    "centered": false,
+    "show-webad": false,
+    "show-instructions": true,
+    "show-control-buttons": true,
+    "sound": true,
+    "sound-dir": "/mathsteroids-sounds",
+    "debug": false
+}
+```
+
+When giving a talk, I use the following config:
+
+```
+{
+    "high-scores": false,
+    "controller": "mega-drive",
+    "game-mode": "time",
+    "pre-html": "<br /><br />",
+    "centered": true,
+    "show-webad": true,
+    "show-instructions": false,
+    "show-control-buttons": false,
+    "debug": false,
+    "sound": true
+}
+```
+
+To run Mathsteroids on an arcade machine at Electromagnetic Field 2024, I used the following config:
+
+```
+{
+    "controller": "emf",
+    "high-scores": false,
+    "pre-html": "<br /><br />",
+    "centered": true,
+    "show-webad": false,
+    "show-control-buttons": false,
+    "show-instructions": false,
+    "debug": false,
+    "sound": false
+}
+```