Cameltry

Cameltry is an arcade game that was released by Taito Corporation in 1989; it runs on the company F2 hardware (the Japanese and first US versions both used that board's standard Yamaha YM-2610 running at 8 MHz for sound, but the second US version used a Yamaha YM-2203, running at 3 MHz, instead). The player must select one of four difficulty levels (Training, Beginner, Expert, and Special) to direct a ball through a maze by using a rotary controller to rotate it, and the game uses inertia and gravity to simulate how an actual ball in a maze could roll in the real world - and if the ball gets stuck or the player wants it to speed up, he or she can press the Jump Button. If the player should run out of time, a random matching game will get invoked to allow him or her more time to finish the current maze; however, it is not easy to win. This game was also the basis for the Special Stages in Sega's Sonic the Hedgehog (1991) - but their rotation was determined by all bumpers which were touched.

This game was later ported to the Sharp X68000, Super Famicom (the American SNES version was renamed to "On the Ball"), FM Towns and iOS; an N-Gage version was planned but never released.