Next to Stick and “Finger follows” there is a third control mode on phones: Tilt. The phone itself is the stick.

How it works
In the pause menu under CONTROLS you cycle between Stick, Tilt and Finger follows. With Tilt, tipping left or right steers sideways, forward or back moves up and down. How far you tilt sets the speed. Small wobbles under 2.5° are ignored, and from 16° the ship flies at full power.
The way you hold the phone at the start and after every pause counts as the center, so you can play sitting, lying down or standing. Tapping free space holds focus, and the round buttons for Dash, Nova and Reprise stay.
On an iPhone the browser asks the first time whether the game may use the motion sensors.
Also fixed: if you pressed PLAY very quickly, you could fly into a black world because the graphics were still loading. Now the start waits with a loading screen.
All details are in the patch notes.