very well done
I think there are NOT a lot of things done wrong in this game. The concept is smart and it's well executed, but I'm just going to post things I think bring down the game to be constructive:
Choppy feel I assume due to low framerate. It's not a huge downside I guess but I noticed it immediately, and smoothness definitely adds a lot to flash games.
The menu. I tried to pause using the p key, which is more commonly used than esc. If you wrote it in the in game instructions I glossed over it, like a large percentage of your audience will. Even fewer people will read the author comments on games. Also, having a mouse activated menu with an entirely keyboard driven game is a put off, even if a small one.
Which kind of segways into the level set up. I think it's OK. A lot of games use a system of letting you choose levels in case you get stuck, or letting you skip a certain amount of levels while still progressing. So just something to think about for future puzzle level games.
The intros. They are too long. Realistically some people probably quit before the intros were done. 10 seconds, or 15 seconds seems like no big deal, but it can be to players.
Last thing is for the simon says levels, the flickering of the white fade is really annoying. It makes sense for the other powers, but not this one.