On Feb 4 2016 a new version of ColEm came out (ver. 3.6).
I tried to compile that one. It does compile to an executable. However, when I copy the Coleco BIOS file and the Donky Kong image that work in another Colecovision emulator (AdamEm) and I try to run it from the command line it unfortunately exits without any error message.
The problem w/ Cool_CV is that it does not run properly on a Pi 1 (much to s.l.o.o.o.o.w….). And AdamEm has video issues (colors are all wrong and you have to restart AdemEm a few times to get it right) and joystick settings cannot be set (use keyboard).
 It appears that, fortunately, the joystick setting can be set after all in AdemEm.