Enter GFXJF as a password to change the ball into various objects, including a rag doll, space man, and alien.

Enter NRRRP as a password

Enter ZLJPJ as a password to change the gravity to match any planet in the solar system.

Enter ZNGGX as a password.

Enter QWNQP as a password. The title screen will appear again with the level number displayed. Press Up or Down to select any level from 1 to 99, then press Start.

Enter MHWYR as a password to access the second plane, or HCCWD to access the third plane of levels.

Enter WRJMH as a password.