Hint: on the game configuration screen, when setting up human/computer players (use SEGA pad X-button = A on your keyboard) press the SEGA pad Y-button (S on your computer) to switch to the next window.
SEGA GENESIS Controls are:
DIRECTIONAL PAD = ARROW KEYS | START = ENTER. MODE = SPACE
A Button = Z. B Button = X. C Button = C | X Button = A. Y Button = S. Z Button = D.