Alien Rocket Defence

Match three or more rockets and 'Fire' !!Two modes of play...1. Normal mode has ever increasing numbers of alien ships in wave after wave. Defeat as many waves as you can.2. Quick mode has a never stopping advancing tide of alien ships ... last as long as you can.1. Select three, or more, rockets of the same color. Each rocket MUST be in a different column.2. Score more for firing more rockets in one shot. Score more for lasting as long as possible.3. Press the 'Fire' button and the rockets will destory the closest alien ship in that column.4. Prevent the aliens reaching the ground level and taking over your world.5. Quick mode - Defeat as many of the continually advancing lines of aliens.6. Normal mode - Defeat waves of aliens. Each wave is quicker than, and has more lines than, the last wave.7. Fire 7 rockets in one shot to earn an 'Attack bomb'. Attack bombs will destroy up to three aliens in the closest column.8. Fire 8 rockets in one shot to earn a 'Defence bomb'. Defence bombs will destroy the closest alien in every column.