Certain icons are unlocked via codes in the Chamber of Time or Vaults, some of which feature space-related designs. Space Waves " (Standalone Game) How to do the Thinking Space Wave : r/geometrydash

The refers to a popular sub-genre of levels that feature this mechanic set against a futuristic, outer-space, or cosmic aesthetic.

If you want to dive deeper into practicing or creating these levels, let me know:

Pulse with the Music: Space levels are known for their heavy use of "pulses" where the background flashes to the beat. Use these visual cues as markers for when you should change direction.