Shooting Gallery is a 45 second target round. Three shelves cross the canvas and targets slide along them from the left or the right at random sizes and speeds. You shoot by clicking on a target before it leaves the far side, and every click counts as a shot whether or not it connects.
A target's value is fixed when it spawns: twice the difference between 50 and its size, plus ten times its travel speed, with a floor of 10 points. Smaller and faster targets pay more. Speed carries its direction sign, so left-to-right targets gain value while right-to-left ones lose it and mostly land on the 10 point minimum. At the end the game reports your score and an efficiency figure — score divided by shots, shown as points per shot.
Yes — on a touch screen the game shows on-screen buttons, and games played with a mouse work by tapping.
It is your score divided by the shots you fired. It rewards hitting high-value targets, not just hitting anything.
No. The picture is picked at random from five and has no effect. Only size and speed decide what a target pays.