Stereo Madness
Stereo Madness is the first level in the game and introduces the ship, along with simple jumping mechanics.
Back On Track
Back On Track is the second level in te game and it introduces the player to jump pads, jump pads boost the player up higher than a normal jump would.
Polargeist
Polargeist Is the third level in the game and introduces double jumps. Double jumps do exactly what they sound like. Add on to the players jump. There are also some increasing difficulty in the cube sequences.
Dry Out
Dry out is the fourth level in the game and introduces upside down cube mechanics. Very simple upside down sequences, and increasingly difficult normal sequnces in both the cube and ship.
Base After Base
Base after base does not introduce anything new, but instead increases the difficulty on all different mechanics thus far.
Can't Let Go
Can't let go also does not introduce anything new, but increases the difficulty on the cube and ship by creating tight spaces and a few tricks.
Jumper
Jumper does not introduce anything too new. The upside down ship is shown for the first time however, and the cube sequences become much more complex with mixed upside down, and right side up parts.
Time Machine
Time machine introduces the side-switching portal. It basically sends you going left rather than right, and hitting another one sends you back to going right as normal. There are also many 3 spike jumps, which must be timed well to make.
Cycles
Cycles introduces a new vehicle, the ball. The ball changes the gravity sending you upside down or right side up every time you click. It also has even more 3 spike jumps than time machine, and a trick or two.
XStep
Xstep improves your skills with all vehicles, but mostly the ball, dramatically increasing the difficulty from cycles.
Clutterfunk
clutterfunk is arguably the hardest non-demon level. It introduces the mini cube, which makes shorter jumps than the normal cube. It also has quite hard ship and ball sequences as well.
Theory Of Everything
Theory of everything introduces the UFO. When you click, the UFO will bounce about as high as a cube would, but you can do this in mid-air instead. It is rather easy other than the first ship sequence.
Electroman Adventures
This level introduces you to the mini vehicles that have not been used yet, and has a very colorful atmosphere. It can be very challenging until beaten once,
Clubstep
Clubstep is the first demon and the 3rd hardest main level. It does not introduce anything new, but puts you up against extremely tight sequnces with all vehicles, and many trick jumps you need to memorize. This level is considered an easy demon.
Electrodynamix
This level is mostly just there to improve upon your skills, but introduces speed boosts and setbacks. You can go either extremely fast or slow.
Hexagon Force
Hexagon force gives you a break from all that extremely hard stuff, and focuses more on the new elements. Slope's, and dual play. Slope's can be riden on and do not kill you when doing so. Dual is basically playing both upside down AND right side up. Controlling both icons at the same time.
Blast Processing
This level can also be considered quite easy, introducing the wave. The wave travels up when you click and hold, and down when released. Similar to the ship, but it will go directly down instead of descending.
Theory Of Everything 2
Obviously, this level is essentially a new theory of everything. But instead it is the second demon level. It introduces the mini wave, which travels up and down more quickly than a normal wave would, This is the second hardest level in the game.
Geometrical Dominator
This level introduces the final vehicle, the robot. Alike the cube, it has no top and bottom boundaries. it it basically a with extended jumps the longer you click and hold down for. this level is slightly harder than the two other break levels, hexagon force and blast processing.
Deadlocked
Deadlocked, the 20th level, and hardest main level, does not introduce anything other than extremely hard to execute jumps, tight gaps in every sequence, and can be clasified still, as an easy/medium demon to most players.