Reflexes are key in this game and the balls fly very fast, which gets your finger moving quickly, i notice. the physics are a bit wonky, especially when the balls curve unexpectedly, making it tricky to master the mechanics.
Moving your finger or mouse to block shots happens quickly, and you need good timing in burst runs, as balls come fast, which is kinda weird anyway.
Inside the game, you click or swipe to move the goalie left or right, which is kinda weird anyway, by clicking or swiping on your screen, which is also kinda tricky, but it works fine, for quick reflex fun.
Quick reactions matter most here and i discovered that slightly anticipating shot directions helps, then you can block curved balls near the posts, especially during rapid fire rounds.
Stuff like the graphics are plain but playable, controls are simple, just swipe or click, and the gameplay is pure reflex-based fun that good for quick breaks, which is kinda weird anyway.