Something that I feel would be just a neat quality of life thing is if you could add a little log that tells you how much you get from interest, when you get a random upgrade, and such. Basically something that tells you the numbers that you as a player have to calculate to figure out if they're useful or not
I played your reactor idle game and I remember screwing up and blowing up millions, having to restart from a few tiers lower than I was at. I look forward to this game somehow doing the same but in a much more convoluted manner