This is level 4 of the U-Tunnel.
Large gaps are present in this level, so you need characters that can jump high and far. The Lizard, Jack-o-Lantern and Runner can jump pretty far, so they are the preferred characters. Also, don't get distracted by the ice ramps that are in the gaps. They are far away and hard to reach, so it is not encouraged to pass this level by jumping on these ice tiles. Just focus on the red-tile path and you will be able to pass this level.
Moreover, since the large platforms are of spiral shape, you should choose characters that can move sideways easily, so don't choose fast-paced characters, namely the Skater.
- This level, before release, originally has the layout and design of Level U-3, but is changed into this level. The reason for this change is unknown.