I like the style of the game, it's very striking. Ambient sound fx fit pretty nicely as well. However the gameplay itself could be more intuitive.
I think there is some real missed opportunities not telling the player what button to press when referring to things like "shockwave" abilities. A lot of players will not know to go to the settings menu to check the controls.
The animation of the blob also does not seem to indicate it will be able to do infinite double jumps. It has a nice looking idle animation, but it looks like the blob is being pressed down by gravity. If you look at characters like kirby who can do similar things they have a separate animation for when they are jumping where they puff up or do something that indicates they can rise even higher with another button press.
Moving the box around with the shockwave ability is also pretty difficult atm.