City Connection, a game by Jaleco where you drive a car around in order to paint the road a different color. Mostly played on the NES by many but there is an arcade version of as seen.

I was playing the game to get some screenshots as reference when I suddenly came across this:

Yes, it's a black bunny. I just so happen to come across it when a car just happen to crash into me. I've played the game for 3 more hours but I never saw it again. I've played City Connection for many times but this is the first I'm hearing of this black bunny.
My chances of someone playing this game recently is slim and even slimmer than someone came across it but, does anyone know what that rabbit is for? The fact that after 3 hours of playing I only saw it once and that I can't find info online about makes me think it's very rare. Is it for points, is to warp to another level, or is it like those annoying cats with flags you gotta avoid. Or am I the only one who came across it.
Jaleco, what were you planning to do with that black bunny?