Cool game, but it REALLY needs some optimization like others mentioned. At some point before even the first black hole, I was getting some insane lag from the number of particles. Not to the point of being unplayable but it was getting there. And this is apparently the START of the game?
So then I bought a black hole even without whatever other upgrade it apparently wanted it me to have, because the number of particles was a pain and I figured it would reset that. So then I'm replaying the start of the game after having bought a negative upgrade. What's even the point of letting the player reach buying a blackhole before it has any upsides and only has downsides other than to be a pain in the ass if you aren't paying 100% attention?
I wouldn't even mind replaying the first bit with nerfed speed since I have the autoclicker and idle upgrades to help carry; But after tabbing away and coming back, the dozens(hundreds?) of autoclicked particles appear to have gotten permanently stuck orbiting the middle and causing the game to lag even more, making it even harder to tell what is going on except that they are apparently not getting properly eaten by the particle. The idea of handling the animation with physics or whatever is cool, but unless I'm really misunderstanding what went wrong it really needs a hard-coded limit for how long those particles can exist to prevent weird situations like that.
Then I closed and re-opened it hoping that would be a fix but there is no save so I guess that's that.
4 distinct ways that a player can end up with a strongly negative experience just by playing normally, and hitting all of them is really unfortunate, because the core loop of the game outside of that fact was honestly really really cool.