Preparing the game page…
Alien Attack is a side-rail shooter. Your ship stays on the left edge and only moves up and down. Fire is manual — hold Fire or Space. Formations march in from the right as a pack. Clear a wave to face a denser one. Three hull hits end the run. W/S and the arrow keys steer; on a phone the Up, Fire, and Down buttons hold while pressed.
Up/Down or W/S to steer. Space or Fire to shoot. On a phone, hold Up, Fire, and Down. Fire is not automatic.
Clear marching formations. Three hull hits end the run.
Place towers and hold six waves.