Police Stories is a fresh take on top-down shooters with an emphasis on tactics that forces you to make split second decisions. here is the basic controls guide on keyboard. if you have any other issues about the controls, you can leave your comment at the end of the post.
WASD – moving
1234 – select item
E – shouting, using handcuffs
Q – back (in menu)
R – reloading
F – Melee/ Interrogate?
Space – regroup with with npc buddy
LMB – shooting
Shift – Sprint
RMB – giving orders/ select buddy equipment
Note: There is no option to change the keyboard and mouse binding. the developer in the Steam said that they will add it soon.