At the Title screen press E N to toggle the barriers.
At the Fighter Selection screen move the mouse to the S in SPORT and press all three mouse buttons. Then move the mouse over the T and do the same thing. Now you can boost your energy by pressing the and the key on the keypad together. I assume the pound sign is on most keyboards
On the highscore table enter the following h3s:
33 EYES.. for LeePai
OVERFIEND. for Chochin
F.O.T.N.S. for Tumpo
SSSSMFSFBF for Ninja
ASTRO BALL for Tam