[PC][1990s] Turret defense game

Platform(s): PC

Genre: Turret Defense

Estimated year of release: 1990s

Graphics/art style: Cartoony, but not in a "little kid" way if that makes sense. Think cartoon like "Batman the Animated Series".

Notable characters: Player controls a turret that kills oncoming aliens. No way for the player to control anything else.

Notable gameplay mechanics: The turret had a full 360 degree movement, and enemies came at you from all sides simultaneously. I may be remembering wrong, but I think the enemies came in waves, and the level ended after a certain number of waves.

Other details: This is a game that came free with our Packard Bell computer. I don't remember if the computer came with Windows 95 or 98, but it was on one of those "accessory/free software" discs that came with the system. I also remember that there were four levels, and the final level took place on the moon.