Make every essential puzzle action reachable by keyboard
The practical problem
A swipe-only mechanic excludes players who cannot or do not use touch gestures. Keyboard interaction needs a visible, systematic alternative.
Implementation protocol
Use focusable tile buttons, arrow key movement where appropriate, and Enter or Space to rotate. Keep reset, hint and next controls in natural Tab order.
Worked scenario
Complete one entire mirror puzzle without a pointing device; track whether the active tile retains focus after rotation and after a win.
What could go wrong
A document-level handler that intercepts every arrow and Tab key can break navigation.
Acceptance criteria
Scope controls to the game region and test screen readers.
Source material and evidence boundaries
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