First used a GUI on my Amiga 500 back in 1987. The interface was relatively fast and responsive with simple window animations. I mostly used it to play videogam

First used a GUI on my Amiga 500 back in 1987. The interface was relatively fast and responsive with simple window animations. I mostly used it to play videogames due to the graphics and S T E R E O sound (which was amazing). In fact, the graphics capability was much more impressive than the novelty of the GUI, and this was coming from a ZX-81 and an Atari 800.