root or get a controller that can turn on mouse mode. As I posted in the other place:

you can get a bluetooth controller that can act like a mouse and your phone should register the clicks as screen touch events. I purchased this controller. After following the instructions laid out HERE, I turned on its mouse mode.

it worked for everything other than the touch. For touch, you need to either root your phone and map a button to touch using one of the root-only key mappers - or get a bluetooth controller that can switch to mouse mode.

you can get a bluetooth controller that can act like a mouse and your phone should register the clicks as screen touch events. I purchased this controller. After following the instructions laid out HERE, I turned on its mouse mode.