Was going to say, the light theme definitely misses some accessibility standards. I'd opt for black text on the yellow buttons, and maybe tweak the yellow a bit darker for further readability.
I haven't played since last year but I personally never had problems with hackers and found it enjoyable. In fact one random person gave me a bunch of free stuff which was really nice!
I can't speak to the GOG version but it frequently goes on sale on Steam (75% off of so), so you wouldn't have to wait long.