Games App: Asteroids, and Pong by tilting

Asteroids is the sixth Game: lean the device to turn, ; for thrust, .
to fire, the arrows too for a device on a table. In Pong, 0 switches
between the keys and tilting and 9 turns the tilt round, both
remembered. Both read the accelerometer through the same smoothing, and
take however the device is held at the start as the middle.

Played on the device: the default way of Pong's tilt was swapped after
trying it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0162FokPdvY2KsS4NBfwyWPk

site/content/guide/games.md

@@ -1,12 +1,12 @@
 +++
 title = "Games"
-description = "Pong, Snake, Tetris, Minesweeper and 2048, for when the radio is quiet."
+description = "Pong, Snake, Tetris, Minesweeper, 2048 and Asteroids, for when the radio is quiet."
 weight = 17
 [extra]
 tag = "Games"
 +++
 
-The Games App opens on its five games, an icon each, as the Launcher shows Apps: <kbd>,</kbd> and <kbd>/</kbd> go from one to the next, with its name and your best so far under the row. <kbd>Enter</kbd> picks one, <kbd>Enter</kbd> again starts it.
+The Games App opens on its six games, an icon each, as the Launcher shows Apps: <kbd>,</kbd> and <kbd>/</kbd> go from one to the next, with its name and your best so far under the row. <kbd>Enter</kbd> picks one, <kbd>Enter</kbd> again starts it.
 
 In every game:
 
@@ -16,12 +16,14 @@ In every game:
 | <kbd>p</kbd> | Pauses. Any key carries on |
 | <kbd>`</kbd> | Back to the other games. This one waits, paused |
 
-A game you leave in the middle, for another game or another App, is **found again paused**, and its icon has an orange dot. While Pong, Snake or Tetris is being played the screen does not dim. The games beep, and Tetris has its tune, unless **Settings → This device → Sound & LED** is off. There is no choice of difficulty: Pong, Snake and Tetris start gently and get faster, and the other two are always the same size.
+A game you leave in the middle, for another game or another App, is **found again paused**, and its icon has an orange dot. While Pong, Snake, Tetris or Asteroids is being played the screen does not dim. The games beep, and Tetris has its tune, unless **Settings → This device → Sound & LED** is off. There is no choice of difficulty: the games on a clock start gently and get faster, and the other two are always the same size.
 
 ## Pong
 
 You have the left paddle, the device the right one. Hold <kbd>;</kbd> to go up and <kbd>.</kbd> to go down. **First to 7 wins.**
 
+Or steer by **tilting the device**: <kbd>0</kbd> switches between the keys and tilting, and the device remembers which. Tilted, the paddle rolls to the low side: lower the top edge and the paddle goes up, raise it and it goes down, about 15 degrees either way for the whole height. However you hold it when the game starts, or when you switch, is the middle. If that feels upside down, <kbd>9</kbd> turns it round (raise the top edge to go up), and that is remembered too. The keys still work while tilting. The top left corner says `keys`, `tilt` or `tilt, inverted`.
+
 Where the ball meets your paddle decides how it leaves: off the middle it goes straight, off an end it goes steeply. Each return makes the ball a little faster. The device's paddle only moves so fast: a steep, fast ball gets past it.
 
 What is kept is your **longest rally**: the most returns you made between two serves.
@@ -71,8 +73,19 @@ The arrows slide every tile on the 4 by 4 board as far as it goes. **Two tiles a
 
 Reaching **2048** is said once, and the game goes on for as long as a move is left. There is nothing to pause: leave it and come back, and the board is as you left it.
 
+## Asteroids
+
+You steer the ship by **leaning the device**: lean it to the right and the ship turns clockwise, to the left and it turns the other way, faster the further you lean. However you hold it when the game starts counts as straight on, so there is no need to hold it flat. <kbd>,</kbd> and <kbd>/</kbd> held turn it too, for a device lying on a table.
+
+| Key | Does |
+|---|---|
+| <kbd>;</kbd> | Thrust, while held. The ship keeps drifting when you let go, slowing a little |
+| <kbd>.</kbd> | Fires. Four shots at most at a time, and they don't go far |
+
+Everything wraps round: what leaves at one edge comes back at the other. A large rock breaks in two, each of those in two again, and the small ones are gone: 20, 50 and 100 points. Clear the field and the next wave has one rock more. You have three ships; a new one comes in the middle, blinking, and nothing can touch it for two seconds.
+
 ## The keys, as the device lists them
 
 What <kbd>Fn</kbd> + <kbd>h</kbd> shows on these screens. These tables are generated from the firmware's own lists, so they are always the current ones.
 
-{{ keys(scopes=["games", "games-pong", "games-snake", "games-tetris", "games-mines", "games-2048"]) }}
+{{ keys(scopes=["games", "games-pong", "games-snake", "games-tetris", "games-mines", "games-2048", "games-asteroids"]) }}