Back when I had my first computer (an 8 bit micro called an Amstrad - around the time of the C64 and Vic20) computer magazines used to publish games as entire listings in BASIC ... so by definition if you wanted to play their 'published' game then you had to type the thing in on your computer, debug it and run it (and then save it to a cassette tape for replay later) ... This got me hooked and I went on to develop my own small games, and also a musical (piano keyboard) application when I was 14 yrs old.