It's a very fun tight platformer with great art. Especially the character looks very nice in the game.
the difficulty is very high, but it felt "fair" until the ice level with the penguins and the hot floors. At this point I couldn't even figure out how to progress and gave up. The trailer showed off some jumping off of penguin head tech which i saw after I quit, but even then bouncing off of penguins was very inconsistent and frustrating. Sometimes you get a big bounce and sometimes you don't.
It would make a world a difference to give some input leniency as many times I swear I landed and jumped off a platform only to use up a double jump. You should be able to initiate a twirl in the air after walking off a platform.
I don't think it mattered for this level but I didn't notice there was a charged shot. maybe there could be a door which requires it at the beginning?
Also a level select.