Not too bad for what it is!
I must say I really love your art style. A lot. Even the game is simple (and a bit boring, but that's just my personal preference) I really find myself not being able to stop looking at the game. Even as we speak, I'm constantly scrolling up to look at that title screen :P However, I think you should take this "simon says" genre and give it a bit of a twist. I'm going to leave that up to you to decide, but you should add some sort of crazy mechanism to make your game stand out from all the other games like this! You've made a good foundation, so why not build on it? Good luck! :) On a side note, I like the music you have for the main menu, but you should do something a bit more... dynamic for the game itself!