Wildlife Kingdom — original browser zoo-management sim

- Procedural canvas art: 15 species × 4 poses, 15 buildings, modular terrain, UI icons
- Habitat enclosure detection, biome suitability, staff/guest AI pathfinding
- Economy: tickets, shops, wages, star rating, research tiers, 15 missions
- Day/night cycle, particles, WebAudio soundtrack & synth SFX
- Mouse + touch controls, responsive UI, localStorage autosave
- Verified: 31/31 logic tests (test/smoke.js) · 12/12 render audits (test/qa.html)

ART_DIRECTION.md

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+# Wildlife Kingdom — Art Direction
+*The in-code "master graphic prompt": every sprite follows these rules.*
+
+## Perspective & Camera
+- **Top-down / slightly isometric**, 2:1 diamond grid (64×32 px tiles), camera reading
+  as a ~45° look-down — the classic premium zoo-builder view.
+- Painter's-algorithm depth (`x+y`), consistent across terrain, fences, objects,
+  buildings, animals and visitors.
+
+## Shape Language
+- Everything is built from **rounded blobs and soft prisms**. No straight harsh edges.
+- Animals: chunky bodies ≈ 2× tall as legs, oversized heads, **big glossy eyes with a
+  single white shine pixel**, rosy blush, tiny smiles.
+- Buildings: extruded iso boxes with three-tone wall shading (top +8%, left 0%,
+  right −10%) and one playful roof feature each (swirl cone, wave dome, mesh aviary,
+  boulder roof, scalloped awning, flag archway).
+
+## Color Palette (natural zoo)
+| Role | Hex |
+|---|---|
+| Fresh greens | `#7cc653 · #63b34c · #4d9a37` |
+| Warm yellows | `#ffd23c · #ffc93c · #f0c05c` |
+| Sky blues    | `#69c3ef · #6ec6ea · #3796cf` |
+| Earth browns | `#a9743f · #c99b62 · #8a5a34` |
+| Soft oranges | `#ff9d47 · #e8823c` |
+| UI cream     | `#fdf6e7 · #f6ead1`, ink `#43362a` |
+
+Accents (red `#e85d5d`, pink `#ff8aa8`) used sparingly for signs, awnings, hearts.
+
+## Lighting Rules
+- One sun, upper-left: highlights top-left of every blob, shade lower-right.
+- Contact shadows: soft translucent ellipses under every entity; buildings cast a
+  footprint shadow.
+- Day/night: sky gradient lerps `#7ec8f5→#2c3e66`; night adds indigo tint + warm
+  radial lamp glows.
+
+## Animation Feel
+- Idle = slow breathing bob + tail/ear sway; walk = sinusoidal leg swing with body
+  bounce; eat = head dip + chew cycle; happy = hop squash-stretch + sparkle/hearts.
+- Visitors waddle (leg phase + lane offsets); kids at 0.68 scale; balloons drift on
+  their own sine.
+- Water breathes via moving highlight arcs; swimmers clip at the waterline with
+  ripple rings.
+
+## Sprite Hygiene
+- Transparent backgrounds, clean readable silhouettes at 40 px (icons) to full size.
+- Consistent scale ratios between species (elephant 1.22 × zebra 0.95 × penguin 0.68).
+- No text, logos or watermark noise inside world sprites.
+
+## UI Identity
+- Cream paper panels, 18–20 px radii, 2 px warm borders, soft drop shadows.
+- Pill HUD stats with hand-drawn icons (coin paw-print, flask, star…).
+- Chunky rounded buttons that depress on click; orange = selection, green = money,
+  red = danger/demolish. Typography: Baloo 2 (rounded, friendly).