Is there/will there be controller support?
Xbox controllers are supported! Works everywhere, except on pause menu. Also supports hybrid keyboard-mouse/joystick.
Will PS4 controllers be supported in the future?
On Windows 10 Ps4 controllers work automatically. On Windows 7 you might need to install a external program such as DS4Windows, very easy to use.
There's not much we can do, as our framework expects Xbox compatible joysticks. We might implement native joystick support, to use any kind, but is difficult and time consuming. We will implement custom key mapping, however.
EDIT: Excellent news. Looks like Steam gives support for PS4 and any Direct Input device, without the need of installing anything:
I still need to specify the mapping for it, as some values are off.