I dropped a knife on the floor.
fill it with blue tack and then colour in
If the stab is not too deep you could lightly sand it down. Fillers for cork are notorious for working their way loose. If it is a bad gouge in the floor - is it a tile? can it be replaced by cutting it out carefully? If all else fails and it is a bad gouge in the floor - buy a mat. Sorry can't be more helpful. My sister had a cork floor and ended up with lots of dents here and there - she ended up with a rattan mat over the top because there was nothing else around which would solve the problem.
