It was quite fun to play! I managed to reach the final planet and even replayed the game once. I had a similar idea involving planets (although it wouldn't have been an incremental game), but scrapped it quickly because of the complexity. That makes it even more impressive to me that you pulled it off.
Losing planets to the black hole also didn't feel frustrating or punishing (even the expensive ones), since it multiplied the money coming in afterwards, which turned out to be a really fun mechanic to play with