Missiles are falling from the sky — your cannon is the only line of defense.
Aim with your mouse or finger, then click / tap to fire an interceptor.
Each interceptor destroys the first missile it touches — then it's gone. Miss, and the shell is wasted.
Every 8 intercepts raises the wave: fresh missiles fall faster.
Let 3 missiles hit the ground and your run is over.
Keyboard: arrow keys move the aim, Space fires.