Base After Base

Base After Base is the fifth level of Geometry Dash and Geometry Dash Lite. It is the first level to be rated "Hard" as of Update 1.9. This level possibly came from Ultimate Destruction, which was never released and was later made into Base After Base.

Description
Base After Base produces increasingly hard jumping patterns and an antigravity section.

The level begins with a difficult cube sequence. The second half of this first cube sequence has high jumps and is trickier to judge. The end of this sequence also has trick yellow jump pads right before the first ship section, which makes it more difficult.

The next sequence is a ship segment. This is more "hall-based" than those of previous levels, with a smaller passage and spikes on alternating sides. Next, the cube takes a moment to flip upwards with antigravity, although this sequence is somewhat easier to predict than the one in Dry Out. However, it features smaller blocks.

Returning to normal gravity with a final few jumps leads to the completion of the level.

Secret Coins

 * The first secret coin is found after the first time the background turns red. After you jump on the ring, you will slide down, and a large flat form will block you. Instead of jumping over, slide down the hole, and then you will get the coin, slide down the jump pad, and return to the normal path.
 * The second coin is located after the background turns completely black. After jumping many flat-forms, there is a spike and a space which you would avoid because it would seemingly lead you to crash. Instead of avoiding it, try to jump over the spike and through the space, and there will be an antigravity portal. It will get the hovering coin, hit a thin platform, fall down, reach a blue gravity portal, and return to the normal path.
 * The last coin is located at the first ship sequence after the background turns purple. When the tunnel starts, after three first spikes, you must lift your ship up and wait until you reach the hidden coin path. Hold the ship up until you have collected the coin and then go down into the normal path.

Trivia

 * The achievement unlocked by completing it in practice mode may refer to the popular catchphrase “All Your Base Are Belong to Us”, from the game Zero Wing (the achievement name is "All Your Base").
 * Base After Base is presumed to have evolved from the level Ultimate Destruction, the level previewed from the Geometry Dash Beta (back then called Geometry Jump).
 * Base After Base was rated "Harder" until Update 1.9.
 * Completing the level takes 1:26.
 * This level is considered to be one of the easiest levels to collect secret coins along with Back on Track.
 * This is one of the four levels not to introduce a new game element. The others are xStep, Can't Let Go, and Jumper.

Errors

 * There is an error in the level. At around 11%, the last thorn next to the big block is missing.