# Fold — review failure and repair

## Material failure

The first interface exposed a `SOUND ON / SOUND OFF` control, but the game runtime produced no sound. The control therefore advertised a capability that did not exist.

## Repair

Procedural Web Audio tones now mark flight start, successful gates, and collision. All tones consult the same mute state controlled by the HUD. Audio is created only after a player gesture.

## Boundary

This is a real review finding from the live pack-proof implementation. Fold is not presented as a clean-room execution of the new pack; it demonstrates the output shape the pack is intended to produce.