Great idea with huge potential. Love the design as well
So far my main complain is that I didn't understand most of the vocabulary, what it means, how it triggers and what's the impact : instability, pressure, error spreading, volatile or corrupted sheets... I'm guessing there's a lot happenning under the hood, but without a tutorial (which obviously is not a priority for an early prototype), everything is pretty cryptic and I just used trial and error to figure out what to place where.
Regarding pacing, it may sound weird but I think there is not enough grind at all : after a few clics I could already afford most of the options on the right, which is a bit overwhelming. I'd rather have only 1 value cell at the start, clic to get a few more, place those and clic again, unlock first sum, etc.
Very curious about how it'll turn out, I'll keep an eye on it!