Distances from the Sun are real in astronomical units (Mercury 0.387 AU, Neptune 30.07 AU).
Body sizes are exaggerated. Earth's actual diameter is 11,700× smaller than its orbital radius — on screen that would be 0.07 pixels. Use the «Visual scale» panel above to see how much they have been inflated.
Barycenter. In reality the centre of mass of the Sun–Jupiter system lies outside the Sun's surface (at 1.07 solar radii from the centre). With the Sun visually enlarged here, the marker appears inside the Sun's drawn body. Reduce the Sun's visual scale to see the real geometric relation.
Time is accelerated — the speed slider ranges from 1 to 1000 years/s.
Orbital lines are theoretical (Keplerian, two-body). Under strong perturbations planets deviate from them — that is the breakdown of KAM tori.
Asteroid belt is decorative — particles follow fixed Kepler orbits around the Sun's mesh, do not participate in N-body gravity, and rigidly track the Sun's wobble in the inertial frame (rather than orbiting the barycenter independently). It auto-hides when a planet falls into the Sun, so the belt doesn't keep peacefully orbiting through a collapsed system.