OF COURSE they do. "Level" means "perpendicular to the gravitational vector. That is indeed how a bubble level works. Since Earth is round-ish, "perpendicular to the gravitational vector" describes a sphere-ish, rather than planar surface.
but I don’t believe it.
That would seem to be a personal problem, and suggests that there really IS no evidence, no measurement, no experiment, that would "prove the ball is spinning" to you.
Have a nice day.
I think you’re right, they are personal issues, but I would believe if an experiment showed me. Before you go, tell me how astrology has proven that we’re moving.