Seeking Hearts
This modification finally addresses an oversight by Minecraft developers - it gives inactive Creaking Hearts the ability to respond to player gaze through analog comparator output.
When you look directly at the heart, it generates a maximum signal strength of 15. The further your gaze deviates from the center of the heart, the weaker the signal becomes. At the same time, the mod completely preserves the standard behavior of active hearts - they continue to function exactly as in the original game version.

Unique Applications
This feature opens up numerous possibilities for creating unusual mechanisms:

Pistons with psychological impact!

Graceful touch-free control!
And this is just a small part of what can be created using this mechanic.
Technical Features
For full functionality, it's sufficient to install the mod only on the server. The client version merely adds the Creaking Heart to the "Redstone" tab in creative mode.