Very cool looking game. I assume it was very easy to obtain upgrades that would just absolutely destroy the difficulty of obtaining money was on purpose as it's meant to be a concept and so any player could see what content the game has to offer, which I respect. At first I thought it was simply the game throwing away monotony for fun, but I soon learned better.
Purchasing all the upgrades to see how much it would bloat my already absolutely massive income made me frightened that it maybe could crash the game, but that's just something I worry about every game I played. But it also made me think about the gameplay mechanic where you would actually want to steer away from accruing too much money from upgrades, so the strategy would be to only get just the amount you need and not to overbloat it. I think there was a game that's done that before, but I don't remember what.
As fun as it was to see the numbers turn to NaN, I can't help but feel less accomplished than I would have if it required some form of commitment in order to finish the game. I suppose that's the endless pursuit of a video gamer. Once you're good at one thing, you try to find something that may line up with your current skill level. When that isn't met, then you can only revel in the sadistic delight of crushing all that opposes you in your warpath of victory. That's what power is, isn't it?