Running fine here on Ventura as a screen saver for me (not tried the logo or app mode).
Can't believe how well it runs on my base spec 14" Pro (M1 Pro). I have it on the Mac screen and a 34" Ultrawide at the same time, 20 random fish on each and the laptop doesn't bat an eye, the fans don't even kick in.
I know it's well beyond the spec that the screen saver was developed on but so was my 2016 top spec intel 13" MBP and it would go into meltdown trying to do similar (and a lot less).
No cutoff on the ultrawide, but the one pictured above looks REALLY wide!
Yes it’s incredibly smooth on my M1 Mac Mini as well and very minimal on CPU usage.
My monitor is a Super Ultrawide at 49in Wide for the screen set at 5120x1440.