Stake Hunt Screengamer
A screengamer is a screensaver and game combined in one. Take control of the vampire bat and use your stake to stab the ghoulish creatures on your desktop in a splat of blood. Collect all of the blood drops to grow larger and advance to the next level. ... Hitting the space bar drops the stake, or manually drive the stake into the ghouls yourself. ... Ghouls and ghosts oh my! ... The screensaver activates just like a normal one does, but pressing the right, left, up, down arrow keys allows you to take control of the bat to play the game.
http://www.dummysoftware2.com/stakehunt.exe - 1Mb - Download - Screenshot