Ultimate Destruction

Ultimate Destruction is an unreleased level from the Geometry Dash beta. Presumably, it probably evolved into what is now known as Base After Base.

Description
What is shown of the level mostly resembles Base After Base, although the start shares the same spike arrangement as Stereo Madness, indicating the level had begun development before it was split up to become those two individual levels. Jump pads and jump rings appear in the level, along with gravity portals of both the entry (yellow) and exit (blue) variants. This goes to show the extent of development had already progressed beyond the original design elements shown in the image below. The last significant difference is the fact that while flying the ship, the drop-down roof had not yet been implemented to contain the ship to the static view and could be flown outside of visibility. The trailer only shows the first two thirds of the level.

Trivia

 * The cube icon seen in the level is unlocked by completing Can't Let Go.
 * The video shows the original name of Geometry Dash was previously Geometry Jump.
 * Robert Topala explained that the composer of the soundtrack, TMM43, did not give permission for it to be used in-game. Despite this, Update 1.9 introducing custom music allows it to be selected for user-created levels. There's even a level with a star in it.
 * The level is actually named "Ultimate Destruction", without a 'm'. This is likely a typo.
 * There is a number 3 in the menu which probably indicates that it gives 3 stars.
 * It is easily noticeable that the game was in beta as the ship section screen does not adjust itself.