Wanted to give more feedback beyond what's already been said (and some insight into the issues I experienced): I did enjoy what's here and what can be accessed. The black hole situation an interesting framing device for what's, at its core, a pretty simple gameplay loop. It was confusing at first in that I thought I had to click instead of it being a timed attack, but once I figured out what was going on, it was clear to me it was well-implemented.
Now, I did have the aforementioned issues others have reported in that at a certain point, the progress bar with the "1/10" denoting the current size of the black hole stops working despite working initially. I was able to deduce from the way different perks behaved that it's not "destroying" the asteroids for whatever reason, and that it seemed to break completely once I purchased the first perk to increase asteroid "density" (but correlation isn't necessarily causation here). There's obviously a few ways to address that issue, so I'm interested in playing it more once that's ironed out!
What's here is fun, the visual design works great (I perused the press kit and the screenshots of further gameplay looked very nice with the "lightning chain" effect and the different color asteroids), and the balancing felt good for the portions I could experience. It'll be interesting to see where this goes from here!