Thanks for the feedback! Yes, the randomness can make or break you run for sure. Usually it has been reasonable for me, but some play throughs were just impossible from the start.
For the green, I am working on another game with the same idea (this was a kind of trial run for that one, in terms of the colors) and I have changed it slightly. From light green and black, I changed it to a light green and a dark green. This makes it much easier on the eyes, and i hope it will benefit the players. I may come back and do it to this game as well, once the jam is over...