You can beat Tetris?
In this case, “beat” is causing the game to crash, lol. You can also roll the levels over (in theory) from 255 back to 0. The game gets glitchy at level 138 though so a human rolling over back to 0 seems fairly unlikely.
This is a great article I was reading earlier about it: https://arstechnica.com/gaming/2024/01/someone-has-finally-beaten-nes-tetris/
Here is a good video explaining it