Hi Steven, thanks for the comment, and for playing the game. I am always very humbled that someone took the time to actually download and play it.
Regarding spawning of missing colours: as i remember it, i actually weighted the distribution of which ones spawn, to favour the ones that are needed. I can hear from your experience that i have to look into that again though. Thanks for sharing. Makes we want to do more DOS games :)
digitally yours, Peter