A VR headset (such as HTC Vive) is required to play.

Based on your request, it seems you are looking for the indie VR physics game , developed for the HTC Vive.

To give you the best information, did you mean the with the "swinging balls" (BLARP!) or the streaming tool for sound effects (Blerp)? Obscure/Trippy VR game - BLARP!

It is designed for sensory overload and requires swinging the objects around, similar to using a yoyo or a rope.

Players control a wand, shepherding an expanding number of "blarps" (balls) while avoiding them touching the controller.

Alternatively, if you meant (with an "e"), that is a popular, free-to-download soundboard extension for streamers.