Each sector lasts at least 120 seconds — defeat its boss to advance. Upgrades chosen between sectors do not count toward combat time. Boss fights run long if your firepower falls short. Practice plays a single sector and does not count toward campaign records.
- Touch / mouse
- Hold and drag anywhere on the field. The fighter auto-fires, and movement is relative — it will not teleport to your finger. The three bottom buttons are always available.
- Keyboard
- WASD / arrows to move; Shift for slow; Space for bomb; E for overdrive; P / Esc to pause.
- Shield & survival
- The small light at the center is your hitbox. About 2 seconds of invincibility after a hit; avoid bullets for 13 seconds to begin regenerating shield. Between sectors: repair 2 hull, refill shield, +1 bomb.
- Weapon supplies
- Blue scatter, green pierce, purple homing, gold burst. Supplies bounce in the field for 10 seconds; same pickup upgrades to Lv.5, switching keeps each level.
- Scoring high
- Consecutive kills stack up to a ×5 combo; grazes add score and overdrive charge. Overdrive lasts 8 seconds, clears bullets on activation, and you still dodge new ones.
- Pause & continue
- Auto-pauses when sent to background. Up to 3 continues — retry the current sector and lose 35% score, upgrades kept. Campaign best is stored on this device only.