Stage 4-1

Head right and encounter a Whipcreat enemy. You can obtain the Whip ability here. Continue right through the door.

In the next room, head right, avoiding the large rolling rods. When you reach the third rod, find a red drum above and to the right of a jumping Whipcreat. Inside is Sticker #1. Head right through the door.

Ignore the battery and proceed right, jumping over wooden blocks until you reach a 3D Warpstar. Use it to enter the foreground and drop into a Robobot. Smash the wood block to your immediate right to find Sticker #2.

Backtrack left, destroying all wooden blocks except the two with green and yellow stars. These will be used later for running in the background.

Reach the end of the path and go through the pipe to return to the start of the room.

Grab the battery and head right again to the end of the room. Insert the battery into the buzzsaw to obtain Code Cube #1. Proceed through the door.

Head up and down slopes until you reach the second downward slope. Take it to the bottom and run right to find an Orange Star Door.

Enter the Orange Star Door and take the pipe to the background. Destroy the bomb block there.

Return to the foreground, collect Code Cube #2, and go back to the previous room. Continue right to the end.

In the next room, head right and use the 3D Warpstar to float to the top left to find the Rare Sticker for this stage.

Continue onward and find a floor you can fall through. Below the main path, enter the Robobot. Scan a nearby Rocky enemy to activate Stone Mode (a special ability for the Robobot).

Return to the main path. When you reach a large rod that appears next to golden blocks in the background, hit the rod to make it crash into the blocks, revealing Code Cube #3 in the background.

Head right, leave the Robobot, and go through the pipe to appear in the background. Collect the Code Cube and exit the stage.