The Amiga and Atari ST version run at six to seven frames per second - having no special chips for sprite scaling like the original arcade, that is not surprising. Also, the "tilt" effect of the arcade (small rotation left and right) was removed as it would require too much additional data for the limited home computer machines. Up to 50 sprites were handled. The scaled sprites were drawn in highest visible resolution, scaled automatically, but then manually corrected for optimal display quality. On the Atari ST, the blitter chip is used if present (introduced with the Mega ST series), which makes this one of the rare games using that chip (as the most widespread ST models didn't feature it). Having more than 512KB Ram, the loading times are reduced, as the graphic is buffered in the extra Ram.