From Custom Solutions of Maryland:
Mimic is a memory game of tones. Mimic generates a series of random tones and the player tries to remember and replay tones using eight colored buttons. This game is easy enough to be fun for anyone four years but hard enough to challenge adults. The game includes a mode to set the series of tones to "Mary had a little lamb" so that you can achieve high scores. Player can also use the buttons to play music as one would a small keyboard.
What's new in this version:
Version 1.5.0 is compatible with Yosemite's default security.