Speed up:
Press Up + Square during game play.

Slow down:
Press Down + Square during game play.

Hidden options:
Successfully complete the game to unlock the "Free Play" and "Pepsiman" options at the main menu. The "Free Play" option allows any level to be replayed with unlimited lives. The "Pepsiman" option allows Pepsiman to turn red and white to match the original Pepsi logo. A "Stealth players" option will also be unlocked.

Wire Pepsiman:
Successfully complete the game with all 100 Pepsi cans collected. Run into the special obstacles to turn into a wireframe Pepsiman.