Aim
Hit as many as you can.
What aim training actually trains
Hitting a target fast combines three things: spotting where it appeared, planning a movement to it, and executing that movement accurately. Aim isolates all three under time pressure. Speed alone is not enough, because every miss costs points, so the game rewards the same balance that competitive players chase: fast acquisition without wild overshooting.
Speed versus accuracy
There is a well known trade-off in motor control: the faster you move toward a target, the less accurate you tend to be. This is formalised as Fitts's law, which predicts how long an accurate movement to a target of a given size and distance will take. Good players move at the speed where their hit rate stays high.
How to score higher
Keep your hand relaxed and your eyes leading your cursor, not following it. Look at the next target before you finish the current movement. Practising smooth, decisive flicks rather than creeping corrections raises both speed and accuracy. Comfortable posture and a stable surface matter more than people expect.