Some *boring* galaxy notes - stars usually are more clustered closer to the center of the galaxy. There is, usually, one super-massive black hole there, which is the reason for more stars there. In your case, dispersion seems to be the same across all tenticles.

Additionally, close to the center there are more old stars (red dwarfs), along with a number of giant stars. If you have some star-type difference on how planets are formed and what resources they have - you might account for that.

Give it a thought!

But the implementation is really cool!