This game falls victim to a seemingly common issue with idle games. There's two styles of idle game, one with exponential growth, and one with diminishing growth, and a loop mechanic. This game falls into the category of exponential growth.
The issue this game falls victim to is that the game starts out rather slow, and it just slightly increases in speed over time. The only thing to remember, at least if you want to make progress in a timely fashion, is to save up for the next big purchase you can make in a reasonable amount of time. This is to capitalize on the exponential nature of the game.
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