What is "dx-ball"

DX-Ball (stylized as DX • BΔLL, sometimes also written as DXBALL) is a freeware computer game for the PC first released in 1996 by Michael P. Welch and Seumas McNally. The game, originally based on an earlier series of Amiga games known as MegaBall, is patterned after classic ball-and-paddle arcade games such as Breakout and Arkanoid. A level editor was also made available as well.