In the "Memories" level, after rolling through the first teleporter, roll up over the arrows. Roll behind the small ice area on the hole and press [Action] to advance to level 4.
Level 12: Level warp
In the "Perilous Ski Slope" level, the secret warp is just before the exit. Get to the area with the breakable floors and the arrows in front of the exit to find the secret warp. Roll on the top-most hole in the second cell from the right. Press [Action] to warp to level 15.
Level 13: Level warp
In the "Bomb Chase" level, the warp is found just before the checkpoint. It is a hole you can reach when the pressure pad is used and the "pressure floors" are visible. From the checkpoint, roll up until you reach the curve. Roll onto the second hole from the top on the right side and press [Action] to warp to level 16.
Level 15: Level warp
Play the "Acid Leak" level until your ball gets smaller. While small, roll down to the place you build the bridge, but do not roll across the bridge. You can now carefully roll slowly beside the wall even when there is no platform. You must roll to the right side. There are many edges to avoid. You will eventually be exactly under the place where the "small-ball" tool is placed. Roll one field to the right then roll down on the hole and press [Action] to warp to level 18.
Level 4: Level warp
In the "Heat Wave" level, start by rolling over the bridge to get the two construction blocks. Next, roll to the large area below. Notice the power ball in the upper right edge. Collect it by constructing a block over the hole. Roll below to the part of the level where you can get the green key. Roll through it until you reach the part where the orange gem is placed. There is a breakable section of wall directly above the teleporter. Use your booster to break through it. Use the teleporter to warp to level 5.
Level 5: Level warp
At the start of the "Swamp Outpost" level, roll to the right to reach the entrance to an area where many explosions are placed. Do not enter this area. Instead, roll in front of it upwards and move to the right. There are some holes down from here. Roll on the outer right hole and press [Action] to warp to level 8.
Level 8: Level warp
In the "Abandoned Stronghold" level, after you return from the first teleporter in this level, build only one bridge to the right where you normally must build three bridge parts. Roll onto the next hole to the right and press [Action] to warp to level 11.
Level 1: Level warp...