This is a developed by Snails Arcade that challenges you to build structures while fending off various enemies.

It lacks modern quality-of-life features like a fullscreen option or scrolling. Some players find the character dialogue too basic and certain random enemy encounters frustrating. Castles (Classic/1991)

If you are looking for the classic city-building and siege management game, it is available on Steam via DOSBox.

Reviewed as an addictive, fun experience for fans of the genre with crisp, simple graphics and a helpful tutorial.