The first known personal computer version, titled "Worm", was programmed in 1978 by Peter Trefonas of the US on the TRS-80, and published by "CLOAD" magazine in the same year. This was followed shortly afterwards with versions from the same author for the Commodore PET and Apple II. A microcomputer clone of the "Hustle" arcade game, itself a clone of "Blockade", was written by Peter Trefonas in 1979 and published by "CLOAD". An authorized version of "Hustle" was published by Milton Bradley for the TI-99/4A in 1980. In 1982's "Snake" for the BBC Micro, by Dave Bresnen, the snake is controlled using the left and right arrow keys relative to the direction it is heading in. The snake increases in speed as it gets longer, and there's only one life; one mistake means starting from the beginning.