Hi,
The game isn't in sale on itch.io, you aren't required to pay to download from itch.io.
However, you can support us on Patreon or Subscribestar to get the unlocked version of the game, hence the "patreon symbol".
Send a @mail at "unifoxgamestudio@gmail.com" and I'll send you for this time only a Patreon version of the game