QuarkMoon said:
Sure.
"who or what decided the laws of physics?"
Excellent question. No one knows. But the more we know about the fundamental nature of things, the closer we get to understanding.
"We know that planets orbit stars because of gravity, who or what created gravity?"
"Why is gravity a byproduct of mass?"
Gravity is currently understood to be the curvature of spacetime caused by the presence of mass. What is the origin of this and why does gravity behave as it does? These are some of the most important questions in science right now.
"Matter tends to compress into spheres, why is that?"
This we do know. Any force (e.g. gravity) that attracts particles equally in all directions will, in aggregate, cause those particles to group as a sphere. This is just basic math and geometry at work. Smaller bodies, such as asteroids, that don't have enough gravity to overcome the friction between the particles that make it up stay lumpy and irregular. Beyond a certain point however, gravity overcomes this and the matter naturally forms a sphere.
"what is wrong with using a supreme being or a all-powerful "force" as an answer?"
The best question of all. If everyone took that stance, no one would investigate the above questions further, which was the state of affairs throughout most of human history, mainly due to religious oppression of free inquiry. If you doubt this, study the history of the great revolutions in scientific thought and look at what scientists had to go through at the hands of religious overlords.