I want a bigger joystick circle

The game is ok, but joystick is not.
When Im playing for a while, the ship run so fast
So I want to stop it by leaving my hand out of the joystick
And I wanna go again, but guess what?

It cant move!!

Joystick circle is too small and always reset to its original position
When Im playing, I dont have time to find where is my baby joystick circle
So can you please adding circles radius? This will help me a lot.

Hsin-pei Wu about Hyperlight