To play Save Pac, use the arrow keys or WASD to navigate Pac through the maze, gobbling up pellets while avoiding ghosts that patrol the paths. Press the spacebar to activate temporary power-ups, which allow Pac to eat ghosts for bonus points, but use them wisely as they have a cooldown. Collect special items like clocks to extend your time or shields to gain temporary invincibility. The goal is to clear each level by eating all pellets within the time limit while dodging or outsmarting ghosts. Watch out for moving walls or traps in advanced levels, and aim for high scores by chaining power-up combos and completing bonus objectives.