The excellent video game Geometry Dash Nine Circles is part of the Dash Series and features the Hard Demon difficulty level. You will need to use gravity gateways to finish off the spheres.
Instructions for playing Geometry Dash Nine Circles
Numerous levels in Nine Circles do not adhere to the order described above; nonetheless, they all have dubstep music and game modes that are often presented in the following order: cube first, then ship, cube second, ball third, wave fourth, and cube fifth. The first part of the level is a straightforward cube segment that comprises of a few hops and tricks. The player has to navigate across an area of the slope that is undetectable to the naked eye when it is set to 45%. At that point, the wave segment changes into one that is compact but sluggish. The final section of the level is a moderately challenging cube part that takes a significant amount of memorization as well as perfectly timed leaps.