Nova Sentinel

A short advert, then you play.
How to play
The goal
Shoot down the invader formation before it reaches your row. You get five lives, and the formation moves faster as it thins. Bank 1,000 points and one lost life comes back — once a run. If the formation reaches your row the run is over whatever your lives say.
What scores
Every invader you shoot pays, and the rows at the back of the formation are worth more than the rows in front. The saucer that crosses the top pays a flyby bonus. Clearing a wave pays a precision bonus measured on hits against shots fired, so spraying costs you, and every wave after that is worth more than the last. Three shields stand between you and the formation; they erode under fire from either side and do not come back. Being hit costs a life, and losing your last one ends the run with what you banked. Restarting or reloading mid-run ends it, and a spent entry does not come back. Leaving the tab pauses you; the controls come back released.
Controls
- Move leftKeyboardLeft arrow / AGamepadD-pad left / Left stick leftTouchD-pad left
- Move rightKeyboardRight arrow / DGamepadD-pad right / Left stick rightTouchD-pad right
- FireKeyboardSpaceGamepadATouchOn-screen button