Lets play with cute cats and get ready to calculate.
Try cats running away from the screen and catch them!
If you give a cat with various numbers and make an answer of 7, you will get a score.
If you answer correctly, you will be in Fever mode. There are lots of cats in Fever mode, you can score up.
By the time you clear all the stages, you are a fine Nyanko formula master! What?
Try high score ranking as well, aim for the top ranking