Little Imps: A Dungeon Builder ⇒

One thing to know: being an Overlord takes patience. The game features real-world timers for building and mining that can range from minutes to hours. While the game has no direct microtransactions, it uses "crystals" (mined in-game) as a currency to bypass these waits. Note that it is not an "idle" game; you have to manually click to confirm finished projects before your imps will move on to the next task.

: Use different flooring types to designate unique room types across multiple tiers. Little Imps: A Dungeon Builder

: Click to mine rocks and clear rubble to grow your subterranean labyrinth. One thing to know: being an Overlord takes patience

See the early-game management and building loop in action here: Note that it is not an "idle" game;

: As your "Glory Level" rises, you’ll attract more powerful subjects, from goblins and trolls to vampires. Mastering the Clock

From Underworld Hopeful to Dark Overlord: Getting Started in Little Imps