No confirmed fix yet. Players suggest: Might as well just delete the demo page at this point https://store.
The problem
There is no link on the demo page to actually download the demo
What players suggest
Still no demo download link on the demo page.....Might as well just delete the demo page at this point https://store.steampowered.com/app/3540890/LUST_CURSE__Demo/?curator_clanid=44359065
Suggested fix (unconfirmed): Press the 'A' key at the exact moment the prompt appears on the screen rather than spamming it. Alternatively, try to bypass the climbing section entirely by jumping around the rocks.
Suggested fix (unconfirmed): Use the top-screen labels to guide your search for the notes. For the 5th note, look on the ledge above the entrance doorway in the large chamber with the second Nymph under "The Liberation of the Nymph."
Suggested fix (unconfirmed): If you use an AZERTY keyboard switched to QWERTY in Windows, remember that the prompted 'A' key corresponds to the 'Q' key on your physical keyboard. Press the correct keys within the small time window as they appear.