Building a Highland in the Savage Wilderness

I transmigrated into a fantasy world, only to discover that it had already been overrun by demons and monsters, with humanity barely clinging to survival?

No need to panic. Let's start with a few minions.

"You purchased 1,000 melee minions."

"You purchased 1,000 ranged minions."

"You purchased 10 super minions."

"Your total spending has reached 5,000 gold. Defense towers and the Life Crystal are now unlocked."

Come on, try reaching the high ground. I dare you!

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.