Do you hear that crushing sound? Yeah. That was my personal record, and quite possibly some other records as well, being crushed like cockroaches. I just finished the longest, single Tetris game so far and came to a conclusion that the speed really does remain the same after a certain level. After that, it all comes down to your ability to resist monotony.
This time I lasted to the level 53! If I could bold that I would. Level 53, 808 lines (...) and 28 640 points! This really is my night. I rule!
Let me repeat that: twenty-eight thousand six hundred and forty points. Whohoo!!!
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The picture below is from the NES Tetris version, which I have. It's just so old it takes a small eternity to make it work and even then it might tilt any second.