Geometry Dash Heartbeat is a 1.9/2.0 Extreme Demon collaboration created by KrmaL, LmAnubis, and Blaireswip. It was generally considered the hardest Extreme Demon at the time of its release.
The level begins with a half-speed cube section with double-spiked jumpers. The player immediately enters a small crushing cube segment, where they must intentionally miss one of the blue orbs to fall upwards. Subsequently, the player encounters a challenging segment with numerous orb configurations and gravity portals. A difficult UFO section follows, featuring multiple tight timings and tricky gravity portals.
The player initiates the game with a lengthy ball spam section that features multiple speed changes. A fairly difficult train sequence ensues, featuring multiple orbs and tricks to avoid. Immediately after, the player enters a ball segment, which features multiple tricky jumps.
There are a total of 3 user coins in this level