Ray Marching a Blob in 3d

Very cool, but this page is just not ready for prime time. I tried it on a few different devices/browsers and it either crashed or lagged so much I couldn't scroll down to read the content. And I'm saying this as someone who's read and written articles about raymarching! Just add a "start" button to the demo and don't render anything until the user presses it. Perhaps some lower-performance defaults would also help (number of raymarching steps, number of metaballs) but that's secondary.