This is Kkilla:

The connection between the rhythm-based platformer Geometry Dash and the rapper KKilla is rooted in the vibrant internet subculture where high-intensity gaming meets underground music. Fans of the game often utilize aggressive, fast-paced tracks to soundtrack their "extreme demons," with artists like KKilla providing the high-energy, rhythmic backbone that complements the precision and speed required for top-tier level creation. This intersection of gaming and rap creates a unique aesthetic where the visual flashes of a complex level sync perfectly with the heavy beats and lyrical flow of the music, driving engagement within both the gaming community and the rap scene.