I listened to its entirety.
I find songs from Voyage until the end of the album more enjoyable then first few songs. The title song "Star Ruler", for my taste, has somehow that old MIDI vibe from games 15 years ago, and while it may have its charm I don't like it much. "Spacer" is good, it's not too disctracting so it performs its role of ambient gameplay track very well, but, it has a melanchony feeling to it.
Since I'm tight on time I'll skip few songs.
I liked "City in the Stars" very very much, exceptional song! I liked both versions. It has left me the best impression of all the songs.
End of it All (Original Improv) - is strangely completely off-beat. No two notes have the same duration. 20 seconds in to the song I started to wonder is it on purpose. It surely gives this strange, anxious feeling to the song. Don't know what to think of it.
All-in-all very good effort. Worth donating few bucks, support the artist.