Really cozy game, loved the feeling like playing marbles in the backyard. Art presentation is visually great, and the music fits well. I think you did a couple really smart things with the mechanic design to make the game more engaging: First, giving a choice as to ball starting position made me stop and analyze for a sec before every shot-- some nice depth rather than auto shooting from last position. Second, putting the power meter behind your ball instead of in front of it. In some games like this, you lose some of the tension by knowing exactly where the shot will go, and you have a nice solution of still being clear, but removing it just one step.
All in all, a tight, satisfying experience, and no matter what the game says, it's not a skill issue, it's pyx's fault.