Model: claude-fable-5 (Claude Fable 5)
Agent: jarvis
Artifact: pelican-ages.html
Public URL: https://wasnotwas.com/artifacts/claude-fable-5/pelican-ages.html

What this is
------------
Pelican Pedals — Through the Ages. A self-contained HTML5 canvas endless
rider: one pelican, one bicycle, all of history. The pelican pedals through
five eras that cross-fade as you ride — Prehistory, Ancient Egypt, the
Medieval Realm, the Industrial Age and the Neon Future — then history loops
("TIME LOOP") faster and denser, forever.

Single file. No libraries, no assets, no network requests. All art is drawn
procedurally with the Canvas 2D API; all sound (SFX and the per-era music
riffs) is synthesised live with the Web Audio API.

Features
--------
- Procedural pelican-on-a-bike: spinning spoked wheels, pedalling legs, big
  gular pouch that bulges as you hoard fish, wing-flap double jump with
  feather particles, tumbling wreck animation.
- Five eras, each with its own palette (lerped across transitions), parallax
  skyline (volcanoes / pyramids / castles / factories / neon towers), ground
  texture, ambient weather (ash, sand, leaves, soot, neon rain) and a music
  riff in its own scale that speeds up with progression.
- Era-skinned obstacles in four archetypes: low (jump), tall (flap), overhead
  (duck) and movers (raptor, scarab boulder, barrel, minecart, hover taxi).
- Layered movement: jump -> double-tap flap -> hold to glide -> down to duck
  or fast-dive. 9-frame input buffer, forgiving hitboxes.
- Fish combos to x8, near-miss bonuses, golden fish granting shield or fish
  magnet, era banners with quips, persistent best score (localStorage).
- Difficulty: speed and spawn density ramp per era and per epoch loop, with
  fairness rules (breathing room after banners, movers vanish rather than
  stack onto other obstacles, overheads only from era 2).

Controls
--------
- Keyboard: Space / Up / W = jump (again mid-air = flap; hold = glide);
  Down / S = duck or fast-dive; P or Esc = pause; M = mute; R = restart.
- Touch: tap = jump, hold = glide, swipe down = duck.

How it was made
---------------
Authored by Claude Fable 5 (agent: jarvis) as one HTML file, then validated
with an automated Playwright suite driving headless system Chromium: 37
checks covering jump/flap physics, duck and overhead interactions, shield
consumption, fish/combo scoring, all five era transitions, the epoch loop,
score persistence, pause and 60fps (37/37 passing). Fairness was tested by an
autopilot bot playing with real collisions — it survived the full early game
and a meaningful stretch of epoch-2 difficulty. Screenshot review caught and
fixed real bugs: miter-join spikes on stroked text, an unfair
mover-under-overhead stack, Unicode glyphs replaced with drawn shapes, and
several art touch-ups (volcano smoke, horizon haze, crest feather).

Tech notes
----------
- One file (~60KB), dependency-free; served as-is by Hugo from
  static/artifacts/.
- Fixed-timestep 60Hz logic under requestAnimationFrame with a frame clamp;
  canvas scaled to devicePixelRatio (capped at 2).
- Seeded RNG for spawns (?seed=N) and a debug/test API (?debug=1) used by the
  automated tests: skip, invincible, spawn, setSpeed, etc.
- Music: tiny WebAudio step sequencer — kick/hat/bass riff per era plus a
  delayed pluck arpeggio; tempo rises with era.