First impressions are none too good. The sprites are poorly defined and lack variety, although the movement and scrolling is very smooth. However, once you get into the game, it's not at all bad. Shoot 'em ups are a very tired genre, but this game has a couple of features which raise it a few notches above the average blaster. The random power-ups dished out after the loss of a life make progression through the more difficult stages much less frustrating, and the wealth of power-ups provide great satisfaction in their wide-spread destruction. There aren't many good up-screen shooters, and whilst this isn't an essential purchase, it's one which bored shoot 'em up fans should definitely consider.