AdVenture Capitalist

AdVenture Capitalist begins with one lemonade stand and a click. Every click completes a sales cycle and pays out cash, which you pour straight back into buying more stands, then newspaper routes, car washes, pizza deliveries, donut shops and oil companies. Each purchase raises your per-second income, and buying in milestone quantities multiplies that business's output.

The game really opens up once you hire managers, who run each business automatically so money keeps flowing while you are away or completely offline. Later you unlock angel investors: reset your empire and those angels grant a permanent global profit bonus, making the next run dramatically faster. Deciding when to grind and when to prestige for angels is the whole strategy. If you like watching numbers snowball, the minimalist survival idler A Dark Room is a great follow-up.