This guide will attempt to describe how to find and earn Moonleap’s fourth secret, earning you the aptly-titled achievement “You Saw the Answer on the Internet.”
Start at the Third Gate
You’ll need to head up to the third locked gate and jump off to the left to access the secret level “Catch the Crow.”
Jump All the Way Left
Jump from the leftmost invisible block on the “Catch the Crow” platform to a separate invisible block all the way to the left.
Head further to the left to reach the room for the fourth secret; the hands that usually represent a secret will be replaced by a makeshift Twitter icon in the center of the screen.
Input Code
The Twitter icon should give you the hint to head to the Twitter account of the developer of the game, @guselect. Once there, find the banner art (also posted below). There are a number of bright stars in the sky. Turn your head so that down is now left and up is now right. Going in order from top to bottom, any bright star inside/to the left of the last blocks is a left input, and any bright stars in the sky/to the right of the last blocks are right inputs. So the code is L-R-L-R-R-R-L-L-R-L-L-L-L. Make sure to hold each input for around half a second, and pause for just a slight moment in between each one. It’s finicky, but keep trying that code, and eventually, you should get the fourth secret.