I Suddenly Gained High-Dimensional Interference Power

What would happen if the protagonist gained the power to directly interfere with reality at Planck-length precision? This book records my occasional flights of fancy, mostly in an infinite-worlds format.

The protagonist is invincible on Earth from day one. His golden finger is powerful, but there's no annoying little System sprite, and the author won't arbitrarily suppress his strength. In most worlds, his combat power is so overwhelming it's practically a deus ex machina. He won't pull the sort of idiotic stunts you see in novice power fantasies, like using a supercomputer to play Tetris. His intelligence is around the average person's.

The first world is a heavily modified Naruto, the second a modified Puella Magi Madoka Magica, the third an original romance simulator, the fourth a Warhammer 40K world where he dominates like a deus ex machina, the fifth a modified version of Shrouding the Heavens, the sixth an endless ascension, the seventh Junji Ito horror manga, and the eighth a ruined area in a world of kayaking...

(A sudden bout of chuunibyou made me write down fantasies from my younger days.) I've read many books with telekinesis or other ridiculously powerful abilities, but the ways they used those powers were often even more ridiculous: grabbing a brick from the roadside to hit someone, competing with an enemy in a contest of strength, or just throwing power at the enemy without a thought. Later, I read imaginative novels like A Journey Beyond Dimensions, Crossing the Fantasy World, and Infinite Obstruction, and wondered how I would use the power to interfere with higher dimensions if I had it. This book records my occasional fantasies. My writing is worse than an elementary school student's, and I'm not good at describing scenes. It's mostly a record of the ideas that pop into my head while reading.