A tribute to the 1978 arcade classic
Move with ← → (or A D), fire with Space, ↑ or W. You can only have one shot on screen at a time. Hide behind the shields, but they crumble. Hit the red mystery ship for bonus points. If the invaders reach the ground, the game is over.
P pause · M mute · Esc this menu · Enter start from the title screen
On a phone or tablet, use the ◀ ▶ and FIRE buttons under the screen. The Settings button pauses the game. No sound on an iPhone? Check that the silent switch is off.
Players, lives and difficulty apply when a new game starts. Settings and high scores are saved in this browser only.