It's a great intro and very cool game-mechanics. Also like these little details like the little rotation on the double jump and it's a good fit for the theme. This game could be extremely fun, but for my taste it's a bit too hard.
There was actually just one real big problem: Not sure, it's somehow kind of embarassing a bit, lol, but really had it: I don't know how often i played the full tutorial from the beginning until the dash section, because this part was ways too hard for me.... (and now believe it or not) until i noticed, there is a "retry"(!) button. I always clicked the "Reset Level" button, because for some reason didn't identify the "retry" one as a button .... now as soon as have noticed, don't understand why i missed it, because it's soo big^^ Just as a feedback, because got actually really frustrated at the beginning of playing this intro section one million times. Maybe just remove the "reset level" button completely, because guess it has anyhow no real usage^^
But all in all i liked it and played now pretty, pretty long :-D