A puzzle game similar to "Marble Madness". The player must guide a ball to the goal of a certain level. You must do this by adding blocks to the squares to influence the ball's movement. You must avoid the edges to prevent the ball falling off.
- 0.37b9: David Haywood and Aaron Giles added Borench (Sega 1990).
- 17th September 2000: David Haywood fixed some bugs in the Sega C2 driver so that Bloxeed, Borench, Poto Poto, Stack Columns and Zunzunkyou no Yabou now work.