SKEIN is a short flight by Core Systems Asset Factory, made for thatgamejam #02 around a piece of music. You lead geese south through a night of wind, rain, and cloud. You begin alone and look for six other geese. A journey is described as about three minutes, and the result is how many of the seven birds get home. It is free on itch.io, with a Windows build beside the browser one. The creator says AI tools assisted code, goose sprites, clouds, and text, and that procedural code drew the backdrops.
How a session of SKEIN starts
Flap to stay up, climb or dive to change height, and pick up geese until the line has seven. The lead bird tires. Birds behind it rest in the wake. Handing over the lead is the verb that keeps the line alive. The listing says timing that handover with the music holds the formation, and mistiming it breaks the line for a moment. Wind, rising air, rain, and cloud all push the flight. Keyboard, mouse, touch, and gamepad are listed.
What you actually decide
When to pass the lead, and which height to hold while you search. A tired leader is a choice you are making by not pressing the handover. There is no upgrade shop. The score, if you want one, is how many geese finish. Seven is the whole flock, including you.
Controls and the first screen
Wing beats are Space, Z, Enter, left click, a tap, or gamepad A. Height is arrows, W and S, mouse position, a drag, or the left stick. Lead handover is X, Shift, right click, the on-screen LEAD button, or gamepad B. Esc or P pauses, M mutes, F is fullscreen. That is a wide input list for a three-minute jam game, so pick one device and ignore the rest.
What the listing does not promise
The three-minute figure is the creator’s description of one journey, not a timer this site measured. The page does not claim a campaign past repeated flights. Other products from the studio are separate and not part of this free game.
Where SKEIN runs
SKEIN is published by CSAF — Core Systems Asset Factory on itch.io. This directory does not host the build, does not re-upload it, and does not put the author’s files inside an iframe unless the author offers an allowlisted embed. Use the official link on this page. If a control, a price, or a version on itch.io disagrees with a sentence here, the author page wins. Both the browser build and the Windows download are on the studio’s itch.io page.
A first sitting
Fly one journey without handing over the lead, just to feel the front bird tire. Then fly another and pass the lead when the music phrase turns. Compare how many of the seven get home. That is the whole lesson the listing describes.
Notes from the listing
On SKEIN, you start alone and gather six more geese. Treat that as something to try in the first sitting, not as a hidden system this page invented. CSAF — Core Systems Asset Factory’s itch.io page is the place that can add or remove it. On SKEIN, the lead bird tires while birds in the wake recover. Treat that as something to try in the first sitting, not as a hidden system this page invented. CSAF — Core Systems Asset Factory’s itch.io page is the place that can add or remove it. On SKEIN, a mistimed handover breaks the formation briefly. Treat that as something to try in the first sitting, not as a hidden system this page invented. CSAF — Core Systems Asset Factory’s itch.io page is the place that can add or remove it. On SKEIN, wind, rising air, rain, and cloud affect the flight. Treat that as something to try in the first sitting, not as a hidden system this page invented. CSAF — Core Systems Asset Factory’s itch.io page is the place that can add or remove it. On SKEIN, one journey is described as about three minutes. Treat that as something to try in the first sitting, not as a hidden system this page invented. CSAF — Core Systems Asset Factory’s itch.io page is the place that can add or remove it. On SKEIN, the creator offers a Windows build as well as browser play. Treat that as something to try in the first sitting, not as a hidden system this page invented. CSAF — Core Systems Asset Factory’s itch.io page is the place that can add or remove it.
