LITTLEREDHACKER

MOVEMENT："←↑↓→" or "WASD"

SHOOT："LEFT CLICK"

HACK INPUT："0 KEY" AND "1 KEY"
FINISH HACK INPUT: "ENTER KEY"

You move with WASD and you can shoot to the mouse position with left click.

There is a barricade that will show a binary code when near. Once you are close enough just write the code either with numpad or normal numbers and hit RETURN/ENTER once you are finished to check if it is wrong or right.

If you want to reset the input you can also hit return/enter. Also, every bullet counts because you will start each level with the same amount you had from the previous one.