Powerhouse

The mitochondria is the powerhouse of the cell — and today, that’s you. Fly the bloodstream, autofire at the junk, grab the good stuff, and climb the training zones. Your score is ATP. Zone 5 is earned. REDLINE is legend.

Powerhouse

You are the mitochondrion. Drag or use WASD to fly — firing is automatic. Outlast the junk, climb the zones.

Tap or press space to start

Powerhouse is a cartoon, not cell biology — no organelles were consulted, and nothing here measures you. For your actual training zones, built on real heart-rate maths with the sources cited, try the Heart Rate Zone calculator. Prefer one heartbeat at a time? Its sibling Lifeline is next door, and the rest of the games live in the Arcade.