One of the things that I like to try and do, when I design a system, is to make so I can reuse what ever I create in future. Now using images would be quicker for this instance, but would create more work for me in the future, and would also require more work if they needed to be changed at any point.
With that in mind, I have made the decision to draw the button frames and text programmatically.
I had to take a break from Space! this past week due to real-world work commitments
Space! The Game