Is there a supreme force, power or being?
No, in Buddhist beliefs and teachings, there is not a supreme force, power or being in the sense of a Supreme creator, Supreme judge.
But, we do acknowledge an external power (or force, but not a being) that is beyond human understanding. This external power is in the spiritual world and can come to us limited human beings when we can let go of the ego-self. This is a force or power that guides us to wisdom and compassion because this force is Wisdom and Compassion itself.
Gassho (with palms together), Rev. Ron