Defend a living spore core against waves of animated microbes. The core fires automatically while you tap priority targets, collect biomass, unlock mutations, and survive escalating acid, shield, tank, fast, slime, and boss enemies.

Tap enemies to focus the spore's shots. Tap glowing biomass to collect it. Use the defensive burst when the meter is ready, or press Space on desktop. Survive waves, choose mutations, grow permanent upgrades between runs, and protect the core for the highest score.