What the pull feels like
Slow at first. A block near the middle starts leaning, then curves, then commits. By the time something is halfway in it is moving fast enough that grabbing it is a real effort, and letting go anywhere near the centre just feeds it.
The hole widens every time it swallows something, so the last few pieces disappear much faster than the first. Watch the radius counter climb and you can see the round accelerating.
Can you save anything?
Sometimes. Catch a block early, drag it hard toward a corner and release it against the wall, and it will orbit for a while before it comes back round. The search box is usually the last survivor because it is wide and it clips the edges.
Switch on cursor chasing and the whole thing changes character. Now you are aiming it, and picking which piece dies next feels a lot more deliberate than watching a page collapse on its own.
Names it goes by
Most listings call it google gravity black hole because it is a rewrite of the falling page rather than its own thing. You will also see black hole google, google blackhole and the occasional google gravity black hole 3d, which usually just means someone added a bit of perspective to the spiral.
If you want the gentle end of the same family, google floating lifts the page instead of eating it. The original is over at google gravity.
Two quick answers
Is there a score? No. Some people treat it as a black hole google easter egg speedrun and time how long they can keep one element alive, which is as close to a game as it gets.
Does it work on touch? Yes. Chasing follows your finger, and rescuing a block by dragging works the same way.