
This is a simple free-kick game in which you kick the ball by literally choosing the contact point, power, and direction between the foot and the ball. There are no hidden stats that magically assist the trajectory for you, so it's actually your skill that matters!
The power of the kick
The contact point on the ball
The direction of impact
Those parameters decides the trajectory, and the animations are just scenery.
If the ball spins horizontally, its trajectory curves left or right.
If the ball spins vertically, the Magnus force pushes it downward, causing the ball to dip faster (see "David Luiz's freekick masterclass" on Youtube)