Harder Game...
	Level select...
	Overcharged...
	Record Your Own Demo...

On the Konami logo screen press down, down, up, up, down, down, down, down, down.

When the Konami screen appears, quickly press (Up then Down) 5 times, Left twice then Right 4 times. If its worked you'll hear a sound effect. Then, on the title screen hold A and press Start and a level select will appear. Oddly, on the Europe version this code produces the sound effect but not the level select. On the US version there is no sound effect and no level select.

Press and hold the A or C button to charge Sparkster's rocket booster for more than 30 seconds. It will overcharge and blow up, which also briefly stuns Sparkster as well.

Start a new game and play normally, but DON'T pause until you're ready to record your demo. When you're ready, pause the game and press UP seven times, DOWN, LEFT, LEFT, LEFT, RIGHT. When the word "Pause" reverses, press RESET and enjoy your demo.