In the early 90's, a small software company called Callisto Corporation released a number of games for the Macintosh, along with a few other productivity applications. One of those games was Spin Doctor, which some long-ago Mac Performa owners may remember because Apple licensed a 10-level Spin Doctor Challenger edition for bundling with "about a million" Performas, according to developer Seth Lipkin.
Lipkin has since ported Spin Doctor, which was sold "in a big box" for $40 when it was first released in 1994, to the iPhone. The game is a bit like chess in the sense that it is easy to learn and difficult to master. It consists of a glowing wand making its way from dot-to-dot through a literal minefield of doors, switches, acid, fuses, bombs, and more. The user controls the direction of the wand -- which never stops moving -- as it moves its way across the map over more than 100 levels with several difficulty modes.