Before posting, check these common fixes:

No movement / no input

• PC and 3DS must be on the same Wi-Fi network
• Allow UDP port 4545 through your firewall

macOS: mouse/keys don’t work

• Enable Accessibility permission:
  System Settings → Privacy & Security → Accessibility

Windows: input blocked

• Allow InkLink through Windows Firewall
• Try running as Administrator

If you still need help, post:

• OS + InkLink version
• What you expected vs what happens
• Screenshot/video + logs