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.