App has selections for +/-/×/÷ problems & jovial music to play (or not) while battling whimsical cartoon zombies of the mad scientist "creations" vibe. Correct answer provides one ammo shot in the form of triangles, rulers, pencils etc. Has 30 Levels w/ options to be easy, normal, or hard. Normal level challenges the cognition of this mentally declining individual. Support the developers & pay for access to all levels & ad removal. Only negative is no 12x12 math multiplication table for review.