Hi, Sorry about that, We fixed it for the game, but kinda forgot the demo version...
You can solve that by using the registry on Windows (though I don't recognize your OS in the picture)
To do so: open the app "Regedit", go to "Computer\HKEY_CURRENT_USER\SOFTWARE\GrizzlyGamerStudio\Robin Morningwood Adventure" and delete everything inside. Relaunch the game and it should work fine.