This page offers a guide on 6th episode of Bianco Hills, The Secret of Dirty Lake.
Firstly, you’ll need to make your way over to the dirty lake by walking down the brick path and through Windmill Village. When you reach the edge of the lake, a Piantas will tell you to use the leaf boats to make your way across the dirty lake. If you fall into the water, you’ll take damage every couple of seconds until you get out of the water. To move the leaf boat, shoot water away from the direction you want to go to push it. These leaf boats will eventually sink into the water, so as you make your way down the lake, make sure to swap out the leaf boat whenever you can.
When you go down the lake between the cliffs, you should be able to spot some logs up ahead. Jump up onto them then high jump and hover over into the tunnel nearby.
Dirty Lake Obstacle Course
During this section of the episode, you’ll need to make your way over to the white cube by crossing over the blue and red rotating platforms. You’ll need to be patient over these platforms as you’ll need to jump from red to blue but also wait for them to turn so you don’t fall off.
When you reach the otherside, you can grab a 1-up mushroom and then hop onto the large cube. After jumping onto the cube, it’ll begin moving north towards the platform ahead, but it will also rotate and you’ll need to make sure you follow the cube’s rotations and stay on top of the cube, otherwise you’ll fall off.
When you reach the yellow path ahead, you’ll need to run past two red triangle obstacles that will push you off the platform if you’re not quick enough. At the other end of this yellow platform is another cube that you’ll need to stay on. It will rotate all different ways as it goes upwards but you’ll need to make sure you stay on the top of it so you don’t fall off.
For the final section of this cave, you’ll need to make your way across a series of red and blue turning platforms. Like before, make your way over them carefully, waiting for the colours to turn before you jump onto them. When you reach the end you’ll be able to grab the Shine Sprite and complete the episode.