H1ghN00n

You are in a classic western standoff, but with a robot that mirrors your every move.  Luckily for you, signal of his MIRR0R chip is weak, so your first goal should be to get as far away from him as you can, by tapping empty hexes in front of you, to get yourself a bigger reaction window and shoot him before he shoots you.

You shoot by simply tapping anywhere when the shooting phase begins, but beware that enemy will predict your moves and punish you if you shoot too soon, indicated by the red sign in the corner of the screen. 

When the green sign comes out your reaction window begins and you can shoot without repercusions.

When the blue sign comes out that means that enemy has already made his shot but you still have time to react.

One last thing to beware are obstacles that have the chance to block your or your opponent's bullets if they are between you, except if they are adjacent to the shooter.