after the last review, i decided to actually get the game. the premise was cool and with fleshing out would be an awesome puzzle game, but after a few days to forget the solutions from the video, i only made it about halfway through world 2 in about a week. the difficulty curve was a little too tight. one thing i wouldn't change, though, is 2-1. the "accidental" realization of that is masterful.
i would also recommend a baba-like approach where you only need a certain amount of levels completed, and it doesn't matter which.
are you perhaps in need of a playtester?