Based on your request, it seems you are looking for the indie VR physics game , developed for the HTC Vive.
While not typically listed as "free," it is a low-cost indie game (priced at roughly $0.99 to $2.99) on Steam .
Players control a wand, shepherding an expanding number of "blarps" (balls) while avoiding them touching the controller. BLARP! Free Download
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!
is a trippy, psychedelic physics-based game often described as a 3D, "swirling" version of Snake . Based on your request, it seems you are
A VR headset (such as HTC Vive) is required to play.
Alternatively, if you meant (with an "e"), that is a popular, free-to-download soundboard extension for streamers. To give you the best information, did you
It is designed for sensory overload and requires swinging the objects around, similar to using a yoyo or a rope.