AFK Arena received update 1.48, which added another Wonderful Journey to the game - Dusty Wastes.
Keep in mind that only the solution to the puzzle is presented here, you can fight the camps in any order.
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Step 1
At the very beginning, move the cart to the top position to make way for the red barrel. After the red barrel is in place, slide the cart down to open the way for the blue barrel.
Step 2
Now use the green lever in the upper right corner to move the blue barrel. You will see that it gets stuck halfway - this is needed to move the red barrel.
Now move the cart to the bottom position and use the purple lever (in the screenshot). This will open the way for the red barrel. Move it and proceed to the next step.
Step 3
Then use the green and purple levers one time and move the cart back to the top position.
Now you need to reset the blue barrel with the switch and use the switch again to send the barrel to the next position.
Step 4
Use the yellow and blue levers and then move the red barrel. It will get stuck on the blue stone, and the blue barrel will be in the right place.
Step 5
Now use the yellow and red levers to clear the path. Then turn the switch in the center, and place the last cart in front of the final points at the top.
You can now move the blue barrel to its last position. You can now grab the first Crystal Chest if you like.
Step 6
Move the cart up again in front of the last point and again turn the switch in the center to its original position.
Now use all 3 levers (yellow, blue and red). Drop the red barrel and send it to the last position. After that, you can pick up the second Crystal Chest.
All you have to do is destroy all the camps and collect the Golden Chests.