This had by far the best explosions, they are extremely similar to the original - perhaps even better? The firing is rapid, so you can put up an excellent barrage to deal with the attacks. Planes drop bombs and them are smart weapons to contend with as well. The colours are generally good but on one level things are a little difficult to see due to the colour choice (also happens on the the arcade original!) Another small point is that the sight can sometimes disappear when moved quickly. This version is really fast and will be enjoyed by players of the arcade version. But the game has one major fault - key layout. The control keys are the cursors, which are bad at the best of times. Fortunately Kempston owners are catered for. Ironically, under keyboard play it is probably the worst of the bunch, whereas with a joystick it is the best. I noted that after about 6 levels a garbled mess of large print appeared at the top of the screen but it didn't affect the game.
Anirog have produced an excellent reproduction of the original in every way. There are 7 keys to control, four for direction and three for movement, which means you must possess a weird type of hand - or better still, a Kempston joystick. All the keys act instantly though. This is the only version which has sound effects when your missile takes off, ending up with a really impressive explosion (sound too). Detailed fighter craft fly overhead releasing even more missiles. Good colours and graphics. I would pay 10p a game to play this one in the arcades. The best of the Bunch.