Baseball Bros keeps things simple compared to a full baseball sim - no season mode, no roster management, just pitching and hitting against another player or the computer in quick, arcade-style matches. The exaggerated art style matches the casual pace, nothing about it takes itself too seriously.
Timing carries most of the actual skill here. A swing thrown a fraction of a second early or late either misses entirely or produces a weak hit that gets caught easily, while a well-timed swing sends the ball deep enough to actually matter. Pitching works the same way in reverse, mixing up speed and placement to throw off an opponent's timing.
Short innings keep matches from dragging, which fits well with the kind of quick session most people are actually looking for during a short break.
Controls: Click or tap to pitch and swing, timed against the ball's approach.
It's not trying to replicate real baseball strategy so much as capture the satisfying feeling of a clean hit, and it mostly succeeds at that. Play it at classroom 6x Unblocked Games whenever a fast, low-stakes matchup sounds like the right call.