Like its cousins Tap Tap Revenge and Justin Bieber Revenge, Katy Perry Revenge is a solid game. Tapulous does a fantastic job of providing a variety of levels within the app, ensuring that players at all levels of skill can enjoy tapping their fingers in time to the music.
One aspect of Katy Perry Revenge that I had mix feelings about was the backdrop for each of the songs. Some were classic, Guitar Hero-inspired themes with neon lights that shoot towards the target in a straight line, while others twisted around coils of candy-cane colored snakes (both, of course, exhibit the obligatory Katy Perry bikini top photos in the background). The latter seemed to throw off my timing and my scores suffered. Overall, the graphics in the game are well done but very, very bright.