Why is my territory in a 2D anime art style?

[Semi-gamified reality][Tower defense leaning][No farming in the early stages] The Origin Realm invades, disaster strikes, the world changes drastically, rules are rewritten, and various professions step onto a new stage of post-apocalyptic reconstruction and fighting against the rampaging Origin Beasts. After awakening, Sui An opened his Lord Core and discovered a unique building blueprint module that could unlock many blueprints with peculiar designs. [The Dawn of Freedom: Wind Strings] gathers the power of a thousand winds, using storm arrows to disperse wind and snow and pierce the starry sky; [The Ancient Dragon Contract Totem] carries the promises of all beings, transforming them into subjects to jointly defend the territory; [The Eternal Thunder Hundred-Eyed Wish Wheel] absorbs the power of all wishes to transform into the form of dreams, wielding the power of purple lightning, its blade light cleaving through mountains and abysses. ...Looking at the world passage before him, the dense tide of Origin Beasts surged like a tsunami, Sui An raised the Heart of Territory high, suspending the entire territory in the sky, transforming it into a sky island, and then blasted it into the Origin Realm with the force of ascension. "I was born to wield the sword, not to guard the shield." "If the enemy can go, so can I!" This book is also known as "Why Play Tower Defense Games When You Have No Money?" and "The Mobile Game Trend Has Finally Reached Another World."