From Big Fish Eat Little Fish to Master of Dimensions

Unemployed young man Zhou Zhun accidentally unlocks dimensional adventures while playing Big Fish Eats Little Fish. In the game, he transforms into Shark Pepper and battles Godzilla. In a historical world, he becomes a Master and charges into a modified Three Kingdoms Holy Grail War. In the world of mortal cultivation, he crosses over as an ordinary passerby to support Daoist Gu and the Strange Immortal, launching a war across the heavens. (PS: This is a slow-burn story. I want to properly lay the groundwork for the protagonist's abilities and golden finger before moving the plot forward, so the early pacing may be rather slow. Following updates will take a little patience. Suggestions in the comments are welcome, and I'll read them all.)