Pause the game by pressing back Space while playing and then type 'DSIMAGIC' and press Space key again. When the yellow capsule appears capture it and you'll be able to summon any capsule or modify the game by pressing one of the following keys:

Enter: Leave Level
B: Opens door and adds bonus points
C: Holds the ball
D: Divides into three balls
E: Lenghtens bat
L: Laser
P: Extra player
S: Slow
F: Warp to the last Level
Unlimited Lives: While playing, type 'RUNCHEAT' for unlimited lives.