That's some good trouble shooting! There is indeed an issue when the text turns green which I found the other day.
It is writing into a memory address that has not been set properly. I don't know how I got away with it but somehow did.
I think this is also behind the crash on exit.
I have been working on a version 0.10 for the last few days to fix this issue and make the game more system friendly.
I've noticed the game running too fast on some systems and also glitching when the map comes on.
Unfortunately it is taking me some time to get this version done as the process of making the game more system friendly is throwing up it's own issues.