From the game box/inlay
BOING! The blockbusting ball bounces back.
The highly developed and intelligent Ball race want to delve into their past to discover their evolution and ancestry. They will have to brave the radioactive dangers of the ancient mines and the perils that lurk beneath.
Their mission: to recover any artifacts that may give them insight into their past.
Different blocks have varying properties which must be correctly exploited to collect the key and reach the exit on each screen. Other objects include magic bombs, life particles (four make up one extra life) and gemstones. When a gemstone is collected, something unusual happens -- often helpful, sometimes frustrating.