Aquarium of Surprises

Aquarium of Surprises is a calm idle game about a small tank. Fish swim on their own and earn coins while you decide what to add next: 10 kinds of fish, 7 plants, 7 decorations and 11 upgrades, each with a clear effect. Events arrive quietly — coin bubbles, a drifting chest, glass to clean, or one of 6 rare visitors that joins a collection of 16 creatures. Pearls unlock special decorations and 4 aquarium themes. No timers, no pressure, no forced ads. All graphics are vector, the sound is synthesised in the browser, and the whole game is under 150 KB.