Your better off just holding the spacebar down when you get to that minigame. You'll be at 100 easy, just as long as you don't get the arrow keys and WASD mixed up (;
So, I spent quite a while killing 100 blobs in the loading screen thinking I'll get a medal for doing so. So nobody else does this; there's no medal, just tears ):
 "Deeper Sleep"){kind=icon}
 "Don't Escape 2"){kind=icon}
 "Don't Escape"){kind=icon}
 "The Deepest Sleep"){kind=icon}
 "Swords and Souls"){kind=icon}
 "Give Up"){kind=icon}
 "Bowmaster Prelude"){kind=icon}
 "SkullFace"){kind=icon}
 "Freeway Fury"){kind=icon}
 "Epic Battle Fantasy 4 - World Map"){kind=icon}
 "Epic Battle Fantasy 3"){kind=icon}
 "Epic Combo!"){kind=icon}
 "The Last Stand: Dead Zone"){kind=icon}
 "Road of the Dead"){kind=icon}
 "Liquid Measure 2 Dark Fluid Level Pack"){kind=icon}
 "Fat Slice"){kind=icon}
 "Multitask"){kind=icon}
 "The Torture Game 2"){kind=icon}