Battle-Spheres

Two players take up positions on a grid liberally dotted with walls and bombs and such like. From their chosen positions the two opponents throw ball-bearings at each other in the fond hope that one of their silver bullets will hit the enemy base. Put simply, you've got to hit your enemy... before they hit you,

The programmer has been most unsporting, however, (aren't they always) and on most of the numerous levels there are enough obstacles to make this simple aim more than a little tricky.