Wildball for Windows Description:

WildBall is clone of classic Arcade game Jezzball.
The game begins in a large capture chamber with one ball bouncing around (Jezzball from Microsoft has two balls at begin) With a click of the mouse, you can build a new chamber wall and trap the balls in a smaller space. But be careful, if you don't build your wall completely across the chamber before it's hit by a ball, it won't withstand the impact.
You can:
change theme,
turn sound off/on,
show or hide grid,
set % to complete level (Jezzball from Microsoft has this value = 75%),
change speed,
and more.