It adds a weird illuminated part to the Sun, so the Sun is not a circle.

Is it possible to add an option to show the tilted version of rotation of Earth+Moon? The simple version is easier to explain to kids, but it's nice to have the advanced version too. [Bonus points for eclpses]

Have you tried to add a realistic scale? Everything is too small. Perhaps keep an option for the current scale, a medium scale and a realistic scale. [Or perhaps keep only the current version.]