The two biggest issues to me: The logic dictating the paddle when on Auto mode is either far too simple or outright broken (as another commenter noted, it always prefers tracking the furthest left ball, which is silly), and you can't easily tell which arrow corresponds to the currently queued ball on the paddle when there's more than 1 ball queued.
Besides that, there is potential here if the balancing can be ironed out and those two issues could be addressed. The playing field feels a bit small, too. It'd feel a bit more engaging if it was about 2-2.5x as wide, and the height sensibly scaled to fit that change.