One of the most prominent features of Ninjatown is the game's visual style. This bubbly, rounded world is full of creatures and characters that look just like the stuffed toys they are inspired by. While there are both a lot of different types of ninja and devils, for the most part, they all look the same (as in most ninjas look like each other and most devils look like each other, not ninjas look like devils). The best way to tell the difference between the various ninjas is by the color of their robes. The basic units wear black, while the more powerful ones wear tan, the ranged fighters where green, etc. Devils also tend to look the same; most are red, while some appear a bit fatter than others, but there are also a few types of other enemies like the green snake creatures or the devils with flame throwers. While at first glance they all appear the same, there are enough details in each character type to let you know what to expect right away.
Sound also takes on a very happy-go-lucky feel that just fits with the plushy characters. While not as noticeable as the visual style, the background music definitely adds to the game's overall feel, and when the volume is turned down, something is definitely missing. Outside of the music, the various hitting and smashing sound effects when the devils invade also go a long way to make the game work.