Top Descriptors messy Visually chaotic and intentionally disorganised patterns, often involving many overlaps and unequal visual spacing between objects. , chaotic Unpredictable map design, often testing unusual skillsets. , avant-garde Employs boundary-pushing and experimental philosophies to map design, often foregoing gameplay and aesthetic conventions to extreme measures. , difficulty spike Contains a sudden and significant increase in challenge within the map's gameplay. , alt Colloquial term for maps which use rhythms that encourage the player to alternate notes. Typically distinct from burst or stream maps. , sharp aim Patterns with heavy use of sharp angle movement, either between circles or into sliders. , gimmick Focused on a single unique design or gameplay idea. , mapping contest An entry for a mapping contest. , streams Patterns requiring continuous movement and alternating, typically more than 9 notes. , improvisation Uses patterns that do not correspond to sounds in the music, often using hitsounds to add sounds in.