Theory of Everything 2

Theory of Everything 2 is the eighteenth official level of Geometry Dash, the sequel to Theory of Everything and the second official level to be rated "Demon". It is unlocked by collecting 20 secret coins (30 prior to Update 2.0). When 20 secret coins are collected the player unlocks the level and a UFO.

Description
Theory of Everything 2 introduces invisible sawblades and invisible slopes, as well as fake slopes. This is the first level to introduce the mini-wave and the double-speed wave.

Secret Coins

 * The first secret coin is located at 13%, in the first mini ship sequence. After entering the yellow gravity portal, the player must hold down to make the ship go under a pile of invisible blocks and grab the secret coin, before returning to the normal route.
 * The second secret coin is located at 65%, in the second wave sequence. In the third diagonal hallway, the player must enter the fake slope to collect the coin, then fly back up on to the normal route.
 * The third secret coin is at 84%, and is hidden above the course of the fifth cube sequence. The player must hit two jump rings and then the one with the X. Then, the player must jump late to collect the coin, then jump once more at the edge of the last platform.
 * If all 3 coins are collected, the player will be rewarded with an extra cube.

Trivia

 * Theory of Everything 2 is the only level which is a sequel of a previous level despite how neither of the levels have something special in common other than the music and the name.
 * Theory of Everything 2 is the only level with soundtrack made by two music composers: DJ Nate and F-777.
 * The name Theory of Everything 2 exceeds 20 characters by 2 characters and is too long to type in as the name of a custom level. The same happens with Geometrical Dominator and Electroman Adventures.
 * Theory of Everything 2 is nicknamed "ToE 2" by fans.
 * Theory of Everything 2 is the only level to end in double speed.
 * Theory of Everything 2 takes 1 minute and 33 seconds to complete and requires a minimum of 93 jumps.
 * The "monster" at the end resembles the new monster obstacle in Update 2.0.

Errors

 * If the level is beaten in practice mode and then the player uses the return button to play it in normal mode, using black as the primary color and any color as the secondary color, at 1%, the first two jump rings' highlights turn black instead of the player's secondary color (which happens when the player chooses black as the primary color).
 * Jumping on the first gravity pad at 1% very early can lead to some awkward results: a crash half-inside a block or a crash high up with missing decoration visible.
 * In 15% it is possible to proceed without entering the yellow gravity portal and thus continue the mini ship segment in normal gravity. This may happen if the ship is landed on the invisible block underneath the portal. It is also possible to miss the first blue gravity portal, and proceed through almost the entire section with reversed gravity.
 * In 16% the player is able to enter the UFO segment in fast speed if the ship was landed on the blocks. If this happens, it is quite unlikely for the player to survive unless the jumps are calculated, timed and very fast.
 * At 18%, above the gravity portal, there is a decoration which is moved down a bit, forming a gap.
 * At 22%, the player may touch the purple jump pad very late and crash into the spike after it.
 * At around 29%, near the bottom of the screen are 4 flattened spikes of your secondary colour, below the third one, the block appears to be a different colour from the rest, and it has 3 ends, shaping like an upside down T, instead of a -•- like formation.
 * In 34% it is possible to tap on the second yellow jump ring when falling and hover over the spike. This happens when the player has timed as late as possible the tap in the blue gravity ring.
 * In 34%-35% the player may spot some decoration missing in the upper right corner of the screen if it is wide enough.
 * In 39% a decorational block is slightly misplaced to the left forming a gap.
 * At 42%, there are background plates of squares and triangles. One of the slightly darker grey triangles seen when the black, wavy line begins to go slanted up, appears to be missing.
 * In the last UFO sequence, it is possible to miss the gravity portal.
 * At around 60%, there is a golden line, below the jump pad before the wave portal. This may not be a decoration error, however every other line is white.