There's a game on ios where you direct a line to an endpoint, you can slow down the speed temporarily and it kind of looks like vector graphics. published by Nicalis. It seems to have been completely removed though. I didn't find it on the app store or my apps list.
Well, this is what the Nicalis wikipedia says:
Developed
1001 Spikes (Steam PC / OS X / Linux, PS4, PS Vita, 3DS, and Wii U) with 8-bit Fanatics
Big Brother (Mobile)
Cave Story (3DS, DSiWare, Wiiware) with Daisuke Amaya
Cave Story 3D (3DS) with Daisuke Amaya
Cave Story Plus (Linux, Mac OS X, Windows) with Daisuke Amaya
Castle in the Darkness (Mac OS X, Windows) with Studio Pixel
Dance Dance Revolution (Mobile)
Dance Dance Revolution: Mobius (Android)
Grinsia (3DS, Windows)
Guxt (3DS)
Ikachan (3DS) with Daisuke Amaya
Legend of Raven (PS4, PS Vita, Xbox One)
MLB Power Pros Baseball (Mobile)
NightSky (3DS, iOS, Linux, Mac OS X, Windows) with Nifflas
Rock Revolution (Mobile)
Swift Switch (iOS)
The Binding of Isaac: Rebirth (Mac OS X, PS4, Linux, PS Vita, Windows) with Edmund McMillen
The Electric Company Wordball! (iOS)
Published
1001 Spikes (3DS, PS4, PS Vita, Wii U, Xbox One)
Castle In The Darkness (Windows)
Cave Story (3DS, DSiWare, Wiiware)
Cave Story Plus (Linux, Mac OS X, Windows)
Grinsia (3DS, Windows)
Guxt (3DS)
Ikachan (3DS)
Legend of Raven (PS4, PS Vita, Xbox One)
NightSky (3DS, iOS, Linux, Mac OS X, Windows)
Swift Switch (iOS)
The 90s Arcade Racer (Wii U, Windows)
The Binding of Isaac: Rebirth (Mac OS X, PS4, Linux, PS Vita, Windows)
Toribash (Linux, Mac OS X, WiiWare, Windows)
VVVVVV (3DS)
So, any of those?