As the alt suffix in its name indicates, this piece corresponds to an alternate variant or revision of another Tetris project circulating in the same preservation archive, possibly with speed, color-palette, or minor rule adjustments compared to the main version. There's no solid documentation on authorship or exact target system beyond that kinship with the other entry. It's one more example of how amateur projects tend to leave multiple versions floating around different forums and archives, without it always being clear which one ended up being the definitive one.
If you liked this one
