Lightweight builder sim with upgrades, customer flow, and revenue loops.

Controls
Create a lightweight cafe builder sim in a single file. Theme: cozy pastel cafe with simple icons. Loop: serve customers -> earn coins -> buy upgrades. Upgrades: faster service, higher tips, more seats. Metrics: customers served, coins, income per minute. UI: queue display, buttons for upgrades, reset button. Controls: click to serve; click upgrades; R restart.
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View demoGrid placement, wave pressure, and upgrades in a clean circuit board theme.
View demo