[xg15]

I think that's the first nontrivial use of multitouch that I have seen in the wild (i.e. that is not basic "pinch to zoom" stuff).

Really cool!

[omnibrain]

How about touch instruments like GeoShred? https://apps.apple.com/de/app/geoshred/id1064769019

[archagon]

Or Seaboard 5D: https://apps.apple.com/us/app/seaboard-5d/id1173937855

(This was extra cool when iPhones supported 3D Touch.)

[CharlesHorsey]

If you like this, there’s a great early iPhone game called Eliss with similar finger twisting multitouch. There’s an Android version now too.

[zuprau]

Early iPhone/iPad games were really creative with this before everyone just settled on making candy crush games.