# Credits and Licenses

This file lists the third-party art and sound used in Endless Runner and the
credit each license requires. Title, author and license details are as stated
on the OpenGameArt.org and Pixabay pages linked below, checked on 2026-09-25.
The Creative Commons terms were checked against the Creative Commons texts.

## Attribution required

### Player running animation: `images/player/run1.png` – `run4.png`

- **Title:** The Awesome Possum (Ultimate Smash Friends)
- **Source artwork:** `supahpossum 2.bmp`, one of two files attached to the
  page below (the other, `awesomepossum sheet.bmp`, was not used).
- **Author:** Redshrike (Stephen Challener)
- **Commissioned by:** OpenGameArt.org
- **Source:** https://opengameart.org/content/the-awesome-possum-ultimate-smash-friends
- **License:** the page offers a choice of two licenses; this project uses
  Creative Commons Attribution 3.0 (CC BY 3.0),
  https://creativecommons.org/licenses/by/3.0/. (OGA-BY 3.0 is also offered
  on the source page as an alternative.)
- **Changes made:** the original work has been modified. Four running/walking
  frames were extracted from the source sprite sheet and exported as separate
  transparent PNG files for use in this game.
- **Original attribution notice (from the source page):** "Art by Redshrike
  (Stephen Challener), commissioned by OpenGameArt.org." The author's page
  also asks that any use link back to opengameart.org, as part of the CC BY
  attribution.

Credit line to show with the game (names the author, the title, the source
link and the license link, and states that the work was modified, as CC BY 3.0
section 4(b) asks):

> Player running animation: four frames adapted from "The Awesome Possum
> (Ultimate Smash Friends)" (`supahpossum 2.bmp`) by Redshrike (Stephen
> Challener), commissioned by OpenGameArt.org, from
> https://opengameart.org/content/the-awesome-possum-ultimate-smash-friends,
> licensed under CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/). The
> original work has been modified.

## No attribution required (credited as a courtesy)

### Coin collection sound: `sounds/coin.mp3`

- **Original title:** coin_2
- **Artist:** soundnimja (via Freesound, distributed through Pixabay)
- **Source:** https://pixabay.com/sound-effects/film-special-effects-coin-2-89099/
- **License:** Pixabay Content License,
  https://pixabay.com/service/license-summary/ — usable without attribution.
- **Changes made:** none. The file is used as downloaded.

Courtesy credit line:

> Coin collection sound: "coin_2" by soundnimja, via Pixabay
> (https://pixabay.com/sound-effects/film-special-effects-coin-2-89099/),
> Pixabay Content License.

### Obstacle sprite: `images/obstacle.png`

- **Title:** Cactus
- **Author:** megupets
- **Source:** https://opengameart.org/content/cactus-3
- **License:** CC0 1.0 (public domain dedication),
  https://creativecommons.org/publicdomain/zero/1.0/
- **Changes made:** none to the file, which is used as downloaded
  (`cactusa0006.png`). It is scaled when drawn in the game.
- CC0 places no credit requirement on this image. The credit above is a
  courtesy to the artist.

## Original to this project

These files were created for this game and contain no third-party artwork.

- `images/background.png`, `images/mountains.png`, `images/trees.png`:
  parallax layers drawn from scratch with a script (gradients and triangles).
- `sounds/jump.mp3`, `sounds/gameover.mp3`: simple tones synthesized with a
  script.