The Construction Site

That circular enemy is holding onto a prize--grab it!

During the race, look for an Object a short ways up the first ramp. When you reach the sponge-swing, use it to reach a hanging girder to the left for a Sticker and Object. As you cross the series of hanging beams, tilt the last one (before a checkpoint) so the right side is slanted upwards, then quickly jump from it to grab 3 Stickers on a high platform. Shortly thereafter, you'll find an Object near a switch when you double-back on your path. When you jump onto the hanging girder after the switch, tilt it so the right side is raised, then jump from it onto a walkway to the right. Follow the path to find a hanging girder that'll move you back and forth along 6 sticker spots in the background. Plant the Skyline 2, 3, and 4 Stickers there to reveal 2 Costumes and 5 Stickers Sticker. Head back and bounce off the spiked enemy afterward to grab an Object in a high alcove.

During the second race, keep an eye out for 2 Objects. After the race, grab an Object from the center of the weird spinning enemy rolling down the ramp. Then check behind the second Checkpoint for a Sticker. At the top of that area, you'll reach a split path: The left leads to an area requiring 2-people, whereas the right takes you further in the level.

Head right at the split path, then bounce off the enemy to a sponge above. Ride it up to collect a 5 Materials and a Key from three hanging platforms (you'll have to use the sides of the platforms like a spring in order to reach the ones above). When you reach the downhill section with the rolling burning objects, collect the 4 Materials along the way, then an Object and 4 Materials on the conveyer belt. You'll find 2 more Stickers just past the checkpoint. After crossing the girders, you'll find an Object. Check below the plant at the end of the level for an Object.