Postcards appear upon starting or after ending the chapter. They give "climbing tips" and convey information to the player. There are a total of 8 postcards in the game.
The first six chapters contain one postcard each with short pieces of advice about the game. They are shown when this chapter's A-side, if it is unfinished, is started from the beginning.
Core has two postcards that are shown upon completing its B-Side and C-Side for the first time. They tell the player about newly unlocked features such as С-Sides and Golden strawberries (B-Side postcard) and Variants (C-Side postcard). They are shown only once.