RTA Guide/Mystery of the Monkey Cage

Mystery of the Monkey Cage is the second mission of Tall, Tall Mountain.

Make sure you have built enough speed and land in the quadrant depicted in the image.

Monkey Glitch tutorial

After choosing to "Hold on" to the monkey on flat ground, you want to time landing on the slope with the next text prompt and choose "Free him".

Corner the monkey against a wall and he will jump over you and pause, giving you time to grab him.

To catch the monkey quickly, chase him up to a wall and do the sideflip beginning motion, and punch him after you turn around.