It's done by members of the keeperklan forum (one of the few surviving dungeon keeper fansites), so I'm not surprised by the dungeon keeper similarities given it originally began as a fan remake of it before they went of the make their own game.
(
after the ea negotiations collapsed (were abandoned?), see the thread on the older forums for it:

https://keeperklan.com/threads/2459-…esigner-wanted
)