Habitable Zone

Habitable Zone is a signal-window reaction game set on a planet inside a fragile habitable zone. The environment signal on the central disc keeps switching: tap on green SAFE windows to harvest energy, hold back on red FLARE warnings, and decide for yourself whether yellow UNSTABLE windows are worth the gamble. Beware of fake green flickers that snap back to red. Consecutive good taps build a multiplier up to x5. Reach the energy target to stabilize each level; lose all shields and the colony falls. Signals switch faster every level. Visit the supply depot for six real upgrades: extra shields, longer green windows, flicker immunity, multiplier lock, charged core, and nano repair. Your credits, upgrades, and best level are saved automatically.