Most of the time I was working predated any graphics!! We started to get PCs as terminals towards the end - I early retired at 50! Anyway, I had great fun decorating programs with nuclei and electrons buzzing round them! The games were all verbal. I think the first very simple graphics came in, but on the PCs, of course, which were not my problem! I volunteered to control playing of games on the main computer so they didn’t get turfed off altogether by the powers-that-be! (I was only a ‘power’ when it came to radioactive material and radiation. Else where I was my usual rebellious self!)