Pick the page that matches the symptom
Crashes, flipped controller glyphs, music that stacks until it is painful, a Deck that stutters on pickup, or a “failed to load mono” box: use the troubleshooting page. That mono box has no Echo Weaver-specific report I could find. The page says so, then gives the generic Unity steps.
If the game runs and a verb is missing, use controls. Only a handful of bindings are confirmed in print: memory read, throw, and the trigger used for the grapple. A full rebinding chart needs an in-game settings screenshot this site does not have yet.
If you are deciding whether to install, use the requirements page. Steam publishes a minimum for Windows and for macOS, and no recommended column. Linux is absent. Deck is Verified.
Update first
The first nine days shipped 1.0.0.60 through 1.0.0.65. Several “I am stuck” reports were bugs: Ivo going silent, a full-health crystal, stacked music, a Depths statue priced too high. The patch-notes page is the changelog. Quote your version when you write to Akupara. A report without a version is hard to match to a fix that already shipped.