If you want integred coolcv to retropie you need first copy your coolcv at cd /opt/retropie/emulators/coolcv and add this lines at nano /etc/emulationstation/es_systems.cfg:
<system> <name>colecovision</name> <fullname>ColecoVision</fullname> <path>~/RetroPie/roms/colecovision</path> <extension>.rom .ROM .col .COL</extension> <command>/opt/retropie/emulators/coolcv/coolcv_pi %ROM% </command> <platform>colecovision</platform> <theme>colecovision</theme> </system>
And don't forget this line finish with:</systemList>
This way work great for coolcv on retropie
keyboard works
joystick works.
Good pleasure!