Apart from the gruesome spelling of the title, this is a very classy piece of machine-code programming, highly professional from start to finish.
Equipped with a laser-cannon and shield, you battle against bomb-dropping birds of various colours, eggs, which when hit reveal their score value eventually hatching out into even more birds, and finally the mothership.
Programmed for both AGF and Kempston joysticks in addition to the keyboard, this program has everything. You are welcomed by an excellent tile page; the attract/demo mode shows what you can expect if you are good enough.
Having selected one of five skill levels, from easy to suicidal, your Spectrum plays classical music and reveals a star field. This can be dispensed with if it irritates you after a while.
Then the game starts! Even the skill levels are carefully arranged so that a beginner can achieve some satisfaction straight away, and this is important. Many much vaunted Spectrum games are so hard that young users are put off straight away.
Superb presentation, graphics and sound. Highly recommended.