Here is the full list of all 13 She Remembered Caterpillars achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
activate a colour swapper five times with the same character
pass all obstacles in a single chapter of Act 2 at least twice
switch direction on the beetle bridge ten times without leaving the bridge (inspired by Tony Hawk Pro Skater 2)
Complete the game
pass any kind of obstacle with two characters simultaneously
reach 60 different states in a single chapter
reach the initial state of a chapter after changing it 25 times
paint a single character in all primary colours
Select various characters at least five times in a row without ever moving one of them
deactivate the snail bridge right before a character is about to cross it
stop a character from walking by activating a bridge in its path
Trigger the same obstacle at least three times
Solve two chapters without activating an obstacle