That's really good feedback all around. Thanks a ton. Could I ask what platform were you playing on, and were you using a hand-held mouse? There are three "energies" (weapons) to choose from, all of which can run out of ammo completely, so also want to make sure that wasn't the case.
Otherwise, the hit point is basically at the center of the screen, just above and between the hands. If you shoot at a wall, the splatter graphic that appears will show you where you are hitting. I had a "crosshair" reference in the game to begin with, but thought it wasn't staying true to the original FPS games like Wolfenstein, Doom, and Hexen. Maybe it'd be better for everyone to toss that in, though.