Similar to Jump Single from Super Monkey Ball, there is a path heading diagonally away from the start. At the later part of that path, there is a slope heading downwards that the monkey will fall if they go down, unless they roll onto an upwards part of the slope near the bottom, allowing them to reach the platform with the Goal.
Follow the pathway until you see the blue arrow pointing in the western direction. Follow down the steep ramp with some good speed, and you should land on the platform with the goal. It is possible to fall out once landed, so be sure to control your speed and go through that goal tape.