Build any boss — any look, any attacks, any arena — then fight it. Make it your own.
Your bosses are saved in this browser. Export them to back up or share.
Describe it in plain English and hit Generate, or set everything by hand. Then Save & Fight.
Drag the dots to sculpt your boss. Back keeps your boss exactly as it was.
Pull dots far apart for spikes, keep them even for a smooth orb.
Survive and wear the boss down to zero.
Desktop
W A S D or ↑ ↓ ← → to move ·
Shift or Space to dash (brief invincibility) ·
your hero auto-fires at the boss.
Touch
Drag anywhere on the left to move. Tap DASH to dodge.
Dashing through bullets is the key to survival. Watch for red telegraph lines — a laser or charge is coming.
Customize yourself. These apply to every boss fight.
Battery Powered Bird