πr² is a multi level arcade game, each level being a series of wheels around which the character travels in order to collect a number of objects whilst avoiding chasers which will slowly destroy his I.Q. (life).
The object of the game is to collect geometric formulae. The formulae are broken down into simple components (πr² into 3) which must be collected in the correct order. The required formula is displayed for a short time before a level begins.