As I don't know the 'little lumpty story', I can't be sure who the main character is. But from the title, it seems that 'Lumpty' is likely to be the main character.
It's a bit of a mixed bag. Some aspects of the Tetris story are based on real events, while others might have been embellished or adapted for entertainment purposes. So, it's not entirely straightforward to say if it's completely true or not.
Tetris doesn't have a real story. It's more about the gameplay and the fun of arranging blocks. The idea behind it is for players to enjoy the challenge, not based on a true tale.
The story of Tetris has elements of truth, but like many stories, it might have been fictionalized or exaggerated to make it more engaging. The core concepts might have roots in reality, but the details could be fabricated.
The fact is that Tetris has a very basic and straightforward control scheme. However, some might think as a fiction that there are complex cheat codes that can completely change the game. In reality, there are no such extreme cheat codes in the traditional sense. Another fact is that Tetris has a high replayability factor. A false idea could be that once you reach a certain level, the game becomes boring. But due to the random nature of the blocks, the game remains engaging even at high levels.
Adventure could be a theme. Imagine Lumpty exploring uncharted territories, facing challenges and overcoming obstacles along the way. It would make for an exciting interactive story.
The 'little lumpty story' remains a mystery to me. However, if I were to guess, it could be a heart - warming story about Lumpty. Perhaps Lumpty is a misfit in a certain community and through a series of events, learns to accept himself and find his place. It could also be a story full of humor and little lessons, like how to be kind or how to face difficulties with courage, but again, this is all speculation without knowing the actual story.
There's no way to know who created '13 tetris fanfic' just from this name. It could be anyone from an amateur writer in the Tetris fan community to a more experienced fanfic author.