[oren-apono]

Pull Request

Type of Change

• Add a new runner
• Fix or improve an existing runner
• Other (site, docs, tooling)

Summary

Adds downhill, a downhill mountain biker on a rough trail.

Thirty frames at 72x36. The trail scrolls past with a changing grade, from a rocky chute to a flat run-in. The rider rolls a drop, then hits a kicker and does a backflip; the trail fades out during the flip and comes back for the landing. The bike's motion comes from a small suspension simulation, so it jolts over rocks and compresses on landings, and the loop is seamless. Under CPU load the descent speeds up.

It is monochrome, so the rider and trail take the menu bar's tint color in light and dark.

The artwork is original: drawn programmatically, not traced from anything.

Checklist for Adding a Runner

• I have read CONTRIBUTING.md and followed the steps described there.
• The runner is my original work, or I hold the rights to it, and I consent to its distribution under this repository's license (Apache-2.0).
• The runner does NOT contain third-party intellectual property (e.g., Pokémon, Mario, or other copyrighted/trademarked characters).
• Files are placed at runners/<runner-name>/ as <runner-name>-frames.zip, metadata.json, and preview.png.
• All frames are PNG files named <runner-name>-frame-<N>.png (numbered from 0), with a height of exactly 36px, a width between 10px and 100px, and all frames share the same size.
• The zip contains only the frames — no .DS_Store, __MACOSX/, or ._* entries.
• metadata.json contains the correct author, displayName, type (monochrome or color), and tags.
• preview.png is an animated PNG (APNG), 36px tall, at most 100px wide, and animates correctly.
• runners/manifest.json includes the new runner name and stays sorted alphabetically.

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