Backyard Volley (internal id 'siege') art credits
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Backyard Volley now uses the Backyard Volley "Twilight Soak-Off" art. It has no image files of its own here:
its renderer (public/siege-render.js) and its library covers REFERENCE / EMBED files that live in
public/assets/sling/ (owned by the Volley art workflow). Their full credits are in public/assets/sling/CREDITS.txt:

  /assets/sling/cardboard.jpg   Cardboard 004, ambientCG (Lennart Demes), https://ambientcg.com/view?id=Cardboard004, CC0 1.0
                                (cardboard fort blocks, kraft signs, shop panel; embedded in covers/siege*.svg)
  /assets/sling/grass.jpg       Grass 004, ambientCG (Lennart Demes), https://ambientcg.com/view?id=Grass004, CC0 1.0
                                (lawn texture; embedded in covers/siege*.svg)
  /assets/sling/hedge.jpg       "Hedge seamless texture pack" vegetation_hedge_30, paramecij, https://opengameart.org/node/22260, CC0
                                (middle hedge; embedded in covers/siege*.svg)
  /assets/sling/kid_*_aim.png, kid_*_hold.png, kid_cheer.png
                                Toon Characters, Kenney, https://kenney.nl/assets/toon-characters, CC0 1.0
                                (the kids at the slingshots; embedded in covers/siege*.svg)
  /assets/sling/glow.png, ripple.png
                                Particle Pack, Kenney, https://kenney.nl/assets/particle-pack, CC0 1.0 (referenced only)
  /assets/sling/CrayonLibre.woff2
                                Crayon Libre font, GGBotNet, https://ggbot.itch.io/crayon-libre-font, CC0 1.0
                                (display lettering on the TV canvas, phone theme; embedded in covers/siege*.svg)

Everything else (cardboard / brick / greenhouse-glass blocks, garden gnomes, water balloons and other ammo,
umbrella, splashes, the sky, roofs, oaks, festoon, fence, slingshots, HUD, shop and banners, the phone preview)
is drawn with canvas / SVG / CSS made for this project.

History: the first Siege build used Kenney "Physics Assets" (CC0, https://kenney.nl/assets/physics-assets:
wood/stone/glass blocks, aliens, debris). Those images were removed on 2026-10-14 when the game took over the
Backyard Volley name and art; nothing from that pack is shipped any more.