These are the controls that the developer did not put in the description for the players to find. Here is the ones I found.
Pressing T makes the game go slow and pressing T again makes it go normal speed
Pressing H makes the player put away there gun
Pressing C makes the players view in third person pressing C again makes it go back to first person
Pressing V makes the player do a melee attack
Pressing L turns on the flashlight
Pressing X makes the player crouch