1. Stars have an "age" parameter, but increasing this parameter does not affect the star in any way. I expected a red giant to explode into a supernova if I increased the age, but nope. The star was completely unaffected, it did not explode, did not loose mass or anything, even if I setted more than its possible lifespan (like several billion years...).
2. I spawned Betelgeuse 1 light year away from the solar system and made it explode. The solar system was completely unaffected... the temperature of Earth increased by something like 2 degrees and life on earth was still present, the orbit didn't change even when the dust cloud reached the solar system.
3. No relativistic effects, I get it, this is very complicated, but when I made Betelgeuse explode the light arrived instantly and so the (little) increase in temperature. I know this may be more complicated to implement than other things I mentioned, but still it's something I noticed.
4. Having the "milky way" as background being setting everytime with the impossibility to change it is a bit annoying, I'd like to have perfectly black background to clearly see particles but it resets everytime you open a simulation or you start a new one, even if you save an empty simulation with black background it sometime resets anyway lol.

I know it makes no sense to create a new thread, now that the forum is close to disclosure, but I recently bought Universe Sandbox. What you think about it?

Personally I'm a bit disappointed... for many reasons:

1. Stars have an "age" parameter, but increasing this parameter does not affect the star in any way. I expected a red giant to explode into a supernova if I increased the age, but nope. The star was completely unaffected, it did not explode, did not loose mass or anything, even if I setted more than its possible lifespan (like several billion years...).
2. I spawned Betelgeuse 1 light year away from the solar system and made it explode. The solar system was completely unaffected... the temperature of Earth increased by something like 2 degrees and life on earth was still present, the orbit didn't change even when the dust cloud reached the solar system.
3. No relativistic effects, I get it, this is very complicated, but when I made Betelgeuse explode the light arrived instantly and so the (little) increase in temperature. I know this may be more complicated to implement than other things I mentioned, but still it's something I noticed.
4. Having the "milky way" as background being setting everytime with the impossibility to change it is a bit annoying, I'd like to have perfectly black background to clearly see particles but it resets everytime you open a simulation or you start a new one, even if you save an empty simulation with black background it sometime resets anyway lol.

Maybe I've set my expectations too high, but it looks a bit uncomplete and "a toy"... orbital mechanics are very accurate and also many things, but it's weird it lacks so many "basic" things. It never really surprised me positively in anything. Especially stellar evolution, it's a relatively easy theory, I don't know how practically complicated it is to implement, but as they change parameters dynamically in a lot of situations, I don't think it would be so complicated. What do you think? Am I missing some settings to enable these things?