Paul Shirley‘s classic isometric puzzle/adventure game, Spindizzy, originated on the Commodore 64, but is also quite excellent on the Atari 800.
You play as a spinning top device, called GERALD (Geographical Environmental Reconnaissance And Land-mapping Device), who must explore the maze-like environment, collecting jewels.
Spindizzy is a hugely challenging game. Too hard for many people, but if you can master the controls you might be able to reach the parts other spinning tops cannot.
The Atari conversion was handled by Mark Roll and the game was released by Electric Dreams in 1986.
More: Spindizzy on Wikipedia