I think this is a great game. Simple and well executed. BdR makes some good points on the mechanics. But I want to say visually the Squinting BOX guy unnerves me. He just kind of blankly looks around the screen randomly like he's seeing things that aren't there, mouth agape and he squints a lot. Is he on drugs? He looks like he's on drugs. Is that what this electricity is? A way for him to get his kicks?
jokes aside if you go back to replay an old puzzle to get more stars it should take you to the menu, not the next puzzle in the series and when replaying a previously beaten puzzle with a tutorial segment I think the tutorial running again is unnecessary.