I used to play that all the time too, I still have the PC that came with it. It was a full game that came with Windows 95 so it's not shareware.
For actual shareware I have a CD with a bunch of games, but the one that sticks in my mind is a type of rat shooting game where you pick the location and weapon. I remember a taser and flame thrower being available, it was fun to play for a few minutes at a time. It's been ages since I've played it, I usually avoid any actual shareware and stick to full software versions of retail games.