It took me a bit to fully understand the ethos of this game, but now that I do, I'm a big fan.
The way resource capacities work is very cool. For those who may not understand, you're able to accumulate resources above their capacity, but the rate of obtaining them will be greatly reduced, and you can't spend more resources than you have the capacity for. This allows me to either play actively or idle, in either case not feeling like I'm missing out on anything. It also makes it important to keep on top of your various upgrades.
I also enjoy the various features, and how they both intertwine and give different things to do as the game progresses. Each could be a decent enough incremental game in its own right, but melding them all together keeps the progression feeling fresh and compelling.
The school feature isn't my favorite, if only because math isn't really my forte, but so far as I can tell, advancing there isn't strictly necessary, and is mostly there to help you obtain gold dust, which can speed up time progression. So long as I'm correct about that, I think the feature is fine and good, as it allows an optional avenue to speed up progression without serving as a roadblock to people who struggle with typing or math.
All in all, I think you have a solid game here, and you seem responsive to making improvements based on player feedback, which is likewise appreciated. Looking forward to seeing where else this game might go!