Scramble is a bit of a classic in the horizontal-scrolling shoot-em-up genre. Obstacles come at you from below and from the right, and you also have to contend with the peaks in the landscape, which often restrict your movement to the top third of the screen. Pretty tight navigation sometimes, and they start to unleash more and more enemies after you get warmed up a bit. The graphics don't look bad, but to save memory, they limit it to one color at a time, which changes every so often.