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Atmospheric exploration platformer

Harkfell

Find lost notes by ear in a world where every sound is synthesized live.

About the game

Harkfell is a quiet platformer where the only map is what you can hear. A missing note calls from somewhere far below and grows louder as you approach, so you wander, climb and wall-jump through 129 rooms of standing stones, wet fen, frozen birch woods and deep caves chasing it home. There are no words and no tutorial — you just set out and listen, and every note you bring back joins the drone that tells you how far you have come.

Game info

Genre
Atmospheric exploration platformer
Categories
Adventure
Developer
Flux Harmonic
Added
November 5, 2026
License
Embedded via itch.io — the developer's official free browser build; code GPL-3.0-or-later, art and music CC BY 4.0

Game features

  • Sound is the map: a missing note calls from its direction and grows louder as you close in
  • Stand still for a moment and the land itself tells you where to go — no words, no compass, no tutorial
  • 129 hand-built rooms across seven regions — the standing stones of the Hollow, the wet reeds of Reedfen, the frozen birch woods of Glasswood, the limestone Pipes, the cliff-top Cloudstair and the deep chambers beneath
  • Every sound is synthesized live while you play — there is not a single recorded audio file in the game
  • Cling to walls and jump off them to scale sheer faces, and hold Down + Jump to drop through birch branches
  • Each note you bring home joins the world's ambient drone, so your progress is audible even with your eyes shut
  • The game pauses by itself whenever you switch tabs or windows

How to play

Move with WASD or the arrow keys and jump with Space or Z — the same jump lets you cling to walls and kick off them to climb. Hold Down and press Jump to drop through birch branches, and press F for fullscreen in the browser. The loop is simple: walk until a note calls from somewhere, then follow the volume. Louder means closer, quieter means turn back, and when the way is unclear, stand still for a moment and let the land point you onward. Climb, swim and wall-jump through the fells until you find where the note is waiting, then carry it home and listen to how the world's drone changes.

Tips & strategies

  1. 1.Stop walking when you lose the way. Standing still is what lets the land speak — its guidance cue is easy to miss while you are moving
  2. 2.Treat volume as distance. If a note grows quieter, you are walking away from it — turn around before you explore further
  3. 3.Play somewhere quiet or use headphones. The whole game is directional audio, so telling left from right is the core skill
  4. 4.Make wall-jumping automatic. Sheer faces hide most of the high routes, and clinging plus a kick-off is always faster than hunting for stairs
  5. 5.Use the drone as a progress map. Notes you have already collected ring inside the ambient sound, so new territory sounds emptier than ground you have covered
  6. 6.Do not rush. The game has no fail state and no timer, and it pauses itself when you switch tabs — it is built for slow listening

Screenshots

Captured from the game running on Gameplo.

Controls

Move / climb / swimWASD or arrow keys
Jump / wall-jumpSpace or Z
Drop through branchesHold Down + Jump
FullscreenF
TouchscreenTouch controls provided by the game — a joystick ring sits in the lower left, and a tap anywhere on the right half jumps. Hold the stick straight down and tap to drop through branches.

Frequently asked questions

Is Harkfell free to play?

Yes. The browser build on this page and on the developer's site is completely free; the downloadable versions are pay-what-you-want, and $0 is an accepted price.

Does Harkfell save my progress?

Yes. Your save lives in browser storage and carries over between releases, so updates never wipe your collected notes.

Do I need headphones to play Harkfell?

No — the game is built to work on laptop and phone speakers too. Headphones just make the direction of each sound much clearer, which is a big part of the fun.

Can I play Harkfell on a phone or tablet?

Yes. The touch interface puts a joystick ring in the lower left corner, and tapping anywhere on the right half of the screen jumps.

How long is Harkfell?

It is a short, relaxing game — the current slice covers 129 rooms across seven named regions, and the developer is adding more regions release by release.

Who made Harkfell?

David Wilson at Flux Harmonic directs it, with AI agents writing the code, rooms, pixel art and music under his direction. The whole project is open source: code is GPL-3.0-or-later and art and music are CC BY 4.0.