Change sun's reflection:
Press [Asterisk] to alter the sun's reflection in the water.
Change sky and water color:
Press D + E + M + O.
Change background color:
Press C + O + L.
Instant recovery:
Press [Shift Lock] to pause game play after being knocked down. Press any key to resume game play already standing.
Speed select:
Press a key from 1 (fastest) through 5 (slowest) to adjust the game speed.