I would like to see this game further support mouse, keyboard and probably any game controller.

As it is now, I can only use the mouse for clicks, drags and drops. The keyboard can only be used to back out of menus and name dwellers.

One extra thing I'd suggest for these would be to use anything that helps zoom in and out of the vault, not like the pinching and stretching that you'd have to do on a touchscreen. The mousewheel or the minus and equals keys would work for this, or perhaps alt-clicking and dragging if that's supported on Android nowadays.

I am assuming you are playing this on your tablet?

I play this game on HP TouchPad, running Android version 4.4.4.

The tablet lost Palm WebOS support years ago, so a breath of new life was needed.

The game runs pretty well on the device, but crashes when I try to sign into the Google Play Games service. So I play without it.

That's what I tested my Bluetooth keyboard and mouse on.

But you never know, if HID support goes full on in for this game, I'd probably play it on a desktop or home theater PC then... not just for experimenting.