Launching today
Lumio: Circuitry
From Logic Gates to a CPU
2 followers
From Logic Gates to a CPU
2 followers
Lumio is a puzzle game about how electronics think. Each level is a blueprint: lamps, switches, and empty slots for logic gates. Drop in the right gates, run the wires, flip the inputs — and the circuit comes alive: lights glow, signals race, counters tick. It all starts with a single lamp and a NOT gate. Then come AND, OR, and XOR, the laws of logic and truth tables, adders, flip-flops and memory, counters, registers, and buses.
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Hi Product Hunt! Lumio started at a lunch with colleagues: everyone was playing chess or match-3 on their phones, and the thought was — what if a casual puzzle actually taught you how a computer works?
Every level in Lumio is a circuit blueprint. The wiring is already there; you choose which logic gate goes into which slot. Later you route wires yourself, build latches, counters and registers, and the last act is a small CPU that runs a program — all from the same AND, OR and NOT. The signal visibly travels along the wires tick by tick, so races and feedback loops are something you see, not read about.
It was built solo over eight months (five of which were, honestly, nothing), the last two in pair with Claude Code — the engine, the level solver and the 14 translations would not exist without it, the ideas and the levels are mine.
371 levels, 18 acts, 176 short lessons, iPhone, iPad and Mac. The first acts are free, the rest is one purchase, no ads or subscriptions.
What I would love to hear: where did you get stuck, and what did you expect the game to be from the first screen? The biggest drop-off in testing was level 1 — people did not expect to think right away.