I mostly based this on Talcerase's guide but gave it some updates

Timing starts on the first click of the title screen.

Rapid click above and to the right of the E in "Adventure." This will let Sissy move to the rainbow before the dialogue. Rapid click through the dialogue and click on the rainbow. Click on Orange Boy, but while walking to him, click back on the rainbow. Sissy will freeze in place in front of the rainbow; click around the top right part of the rainbow to continue dialogue with him. Speed through dialogue and click the rainbow.

(Rainbows are counted from left to right)

FIFTH RAINBOW Upon entering, make sure the lemon begins dialogue (if not, you won't be able to grab the coconut) Spam through dialogue and grab the key. Look at the sign and make sure the audio begins. Exit through the rainbow

THIRD RAINBOW A few frames before entering the third rainbow, spam click on the second rainbow (the lower right, yellow part). This will teleport you to the blue ponycorn Spam click the tiger until he closes his eyes Get the blue ponycorn and coconut Exit through the rainbow

SECOND RAINBOW A few frames before entering the second rainbow, spam click on the lowerest right corner of the third rainbow (this one is usually more forgiving). This teleports you right next to the cage. Spam click the dragon until he is a mouse then unlock and collect the purple ponycorn. Exit through the rainbow

FIRST RAINBOW Click to the left of the turtle where the pink ponycorn will appear. While walking there, spam the conversation with the turtle and flip him over. Collect the pink ponycorn Exit through the rainbow

FIFTH RAINBOW (I haven't figured this out exactly, but clicking somewhere on the ground before clicking the lemon will skip the walking animation before throwing the coconut at the lemon) Throw coconut at lemon and grab the ponycorn Exit through the rainbow

(wait for Orange Boy to begin to murmur)

FOURTH RAINBOW Spam through dialogue and collect final ponycorn Exit through the rainbow

Wait for Sissy to begin to speak and then spam through dialogue Time ends when "THE END" appears.