at least on the Linux (0.35.1) Lily's gallery is b0rken:
IOError: Couldn't find file 'lily/lily_park_exhib15.webp'.
replacing encounters.rpy::56 with
("lily_park_night_walk_happy_ending", "lily/lily_park_night_walk/lily_park_exhib15.webp"),
seems to be a valid fix.
Fun so far, looking forward to see more of the plot!