A shooting game you cannot lose
There is no fail state here at all. No health, no lives, no timer, no ammunition limit, and no way for an eagle to do anything to you. You can stand still for a minute and the game will wait. That single fact is what separates it from almost everything else in the shooting collection, and it is worth knowing before you start, because it changes what you should be paying attention to.
With nothing at stake, the usual tension of a shooter is gone. What is left is the aiming itself - the small problem of getting a shot to meet a moving bird - repeated ten times with no penalty attached to getting it wrong. That makes it a genuinely relaxed game, and it is one of very few here you can put in front of a child or a complete beginner without them losing in the first thirty seconds.
It also means the difficulty is entirely self-imposed. If you want it to be hard, the challenge is doing it in ten shots.