Bumper Circuit ("Scrapyard Smash") art assets. Legacy files below are CC0 1.0 (public domain dedication); new generated artwork is identified separately.
Licences re-verified 2026-10-14: each Kenney zip contains a License.txt stating CC0; the ambientCG asset pages state
"All assets are released under the Creative Commons CC0 license"; the GGBotNet zip contains a CC0 1.0 Universal LICENSE
file and its OpenGameArt entry lists the licence as CC0.
Images were downscaled (and steel.jpg darkened) for size; nothing else was changed.
Format: file | pack / original file | author | source URL | licence

barrel.png | Racing Pack / PNG/Objects/barrel_red.png | Kenney (kenney.nl) | https://kenney.nl/assets/racing-pack | CC0 1.0
barrel_down.png | Racing Pack / PNG/Objects/barrel_red_down.png | Kenney (kenney.nl) | https://kenney.nl/assets/racing-pack | CC0 1.0
barrel_blue.png | Racing Pack / PNG/Objects/barrel_blue.png | Kenney (kenney.nl) | https://kenney.nl/assets/racing-pack | CC0 1.0
oil.png | Racing Pack / PNG/Objects/oil.png | Kenney (kenney.nl) | https://kenney.nl/assets/racing-pack | CC0 1.0
tires_white.png | Racing Pack / PNG/Objects/tires_white.png | Kenney (kenney.nl) | https://kenney.nl/assets/racing-pack | CC0 1.0
tires_red.png | Racing Pack / PNG/Objects/tires_red.png | Kenney (kenney.nl) | https://kenney.nl/assets/racing-pack | CC0 1.0
tribune.png | Racing Pack / PNG/Objects/tribune_full.png (448 -> 224 px wide) | Kenney (kenney.nl) | https://kenney.nl/assets/racing-pack | CC0 1.0
lights.png | Racing Pack / PNG/Objects/lights.png | Kenney (kenney.nl) | https://kenney.nl/assets/racing-pack | CC0 1.0
smoke.png | Particle Pack / PNG (Transparent)/smoke_04.png (512 -> 128 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
smoke2.png | Particle Pack / PNG (Transparent)/smoke_08.png (512 -> 128 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
dirt_burst.png | Particle Pack / PNG (Transparent)/dirt_02.png (512 -> 128 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
impact.png | Particle Pack / PNG (Transparent)/scorch_02.png (512 -> 128 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
glint.png | Particle Pack / PNG (Transparent)/star_01.png (512 -> 96 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
wrench.png | Game Icons / PNG/White/2x/wrench.png | Kenney (kenney.nl) | https://kenney.nl/assets/game-icons | CC0 1.0
trophy.png | Game Icons / PNG/White/2x/trophy.png | Kenney (kenney.nl) | https://kenney.nl/assets/game-icons | CC0 1.0
warning.png | Game Icons / PNG/White/2x/warning.png | Kenney (kenney.nl) | https://kenney.nl/assets/game-icons | CC0 1.0
dirt.jpg | ambientCG Ground048 / Ground048_1K-JPG_Color.jpg (1024 -> 256 px, q75) | ambientCG (Lennart Demes) | https://ambientcg.com/view?id=Ground048 | CC0 1.0
plate_hazard.jpg | ambientCG DiamondPlate006C / DiamondPlate006C_1K-JPG_Color.jpg (1024 -> 256 px, q75) | ambientCG (Lennart Demes) | https://ambientcg.com/view?id=DiamondPlate006C | CC0 1.0
plate_dark.jpg | ambientCG DiamondPlate008A / DiamondPlate008A_1K-JPG_Color.jpg (1024 -> 256 px, q75) | ambientCG (Lennart Demes) | https://ambientcg.com/view?id=DiamondPlate008A | CC0 1.0
steel.jpg | ambientCG CorrugatedSteel005 / CorrugatedSteel005_1K-JPG_Color.jpg (1024 -> 256 px, darkened 60%, q75) | ambientCG (Lennart Demes) | https://ambientcg.com/view?id=CorrugatedSteel005 | CC0 1.0
Blaec-Italic.ttf | GGBotNet Fonts CC0 (All-in-1) / GGBotNet Fonts CC0/Blaec/TrueType (.ttf)/Blaec-Italic.ttf | GGBotNet | https://opengameart.org/content/ggbotnet-fonts-cc0-all-in-1 | CC0 1.0
DeltaBlock-Regular.ttf | GGBotNet Fonts CC0 (All-in-1) / GGBotNet Fonts CC0/Delta Block/TrueType (.ttf)/DeltaBlock-Regular.ttf | GGBotNet | https://opengameart.org/content/ggbotnet-fonts-cc0-all-in-1 | CC0 1.0
DigitTech16-Regular.ttf | GGBotNet Fonts CC0 (All-in-1) / GGBotNet Fonts CC0/Digit Tech/TrueType (.ttf)/DigitTech16-Regular.ttf | GGBotNet | https://opengameart.org/content/ggbotnet-fonts-cc0-all-in-1 | CC0 1.0

Round 2 ("Lights Out") additions, licences re-verified 2026-10-14 (Kenney pages list "Creative Commons CC0" and both zips
contain a CC0 License.txt; the ambientCG pages state "All assets are released under the Creative Commons CC0 license"):
light.png | Particle Pack / PNG (Transparent)/light_01.png (512 -> 128 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
muzzle.png | Particle Pack / PNG (Transparent)/muzzle_02.png (512 -> 96 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
trace.png | Particle Pack / PNG (Transparent)/trace_04.png (512 -> 96 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
scratch.png | Particle Pack / PNG (Transparent)/scratch_01.png (512 -> 128 px) | Kenney (kenney.nl) | https://kenney.nl/assets/particle-pack | CC0 1.0
bsmoke1.png | Smoke Particles / PNG/Black smoke/blackSmoke00.png (-> 96 px) | Kenney (kenney.nl) | https://kenney.nl/assets/smoke-particles | CC0 1.0
bsmoke2.png | Smoke Particles / PNG/Black smoke/blackSmoke06.png (-> 96 px) | Kenney (kenney.nl) | https://kenney.nl/assets/smoke-particles | CC0 1.0
bsmoke3.png | Smoke Particles / PNG/Black smoke/blackSmoke12.png (-> 96 px) | Kenney (kenney.nl) | https://kenney.nl/assets/smoke-particles | CC0 1.0
bsmoke4.png | Smoke Particles / PNG/Black smoke/blackSmoke18.png (-> 96 px) | Kenney (kenney.nl) | https://kenney.nl/assets/smoke-particles | CC0 1.0
fence.png | ambientCG Fence006 / Fence006_1K-JPG_Color.jpg + Fence006_1K-JPG_Opacity.jpg (opacity baked into alpha, 1024 -> 256 px) | ambientCG (Lennart Demes) | https://ambientcg.com/view?id=Fence006 | CC0 1.0
rust.jpg | ambientCG Rust009 / Rust009_1K-JPG_Color.jpg (1024 -> 256 px, q70) | ambientCG (Lennart Demes) | https://ambientcg.com/view?id=Rust009 | CC0 1.0
barrel_blue.png and warning.png are no longer referenced by the renderer (round 2) but are kept in the folder.

The cover and banner SVGs (public/assets/covers/derby.svg, derby-banner.svg) embed copies of dirt.jpg, plate_hazard.jpg,
tires_white.png, tires_red.png, lights.png, impact.png, barrel.png, oil.png and Blaec-Italic.ttf as base64 data URIs
(round 2 dropped the tribune.png strip from both).
Everything else (derby cars, spark streaks, UI chrome, lettering layout, round-2 scrapyard skyline, crane, chain-link
lattice, headlight cones and the block roundel digits) is hand-drawn for Tap Tavern.

comic-asphalt-v2.png | OpenAI built-in imagegen, generated 2026-10-18 for this project; not a third-party CC0 asset. Prompt: Seamless square top-down asphalt roadway only, no cars objects text markings borders. Hand-inked graphic novel demolition derby; dusty plum brown asphalt, tiny warm stone flecks, restrained cracks, black skid scuffs, warm edge-lit pebbles, screenprinted grain.