From itch.io:
You are a traveller in a weird and wonderful (and discomfiting and slightly uncomfortable world) - and you have a odd and uncanny tale to tell (whether it be a scathingly bad review of a tour or an unfortunate brush with the numinous).
In the scramble for something (anything!) to jot down your experiences, you find the good old 45c postcard. Perhaps you are just saving this to write up properly later or maybe you feel the folks at home will offer more sympathy for your travails, either way this little piece of card with a cute scenery photo on it is your medium.
Tall Tales & Alien Skies is a journaling rpg that is intended for solo play but can be played in small-group format (where everyone chips in to answer the questions with as zany an answer as they prefer).