I really like the concept! I made it to the end and had fun playing it, but as others said there some parts that felt a little bit clunky.
Some examples to me were in the underwater world, the movement felt a bit hard to control. I felt like my character was drifting (maybe intentional because of the water?) but it wasn't easy to maneuver. Similarly in the alien level, even with the double jump the way to climb the platforms was a bit difficult
On the other hand though some things felt quite nice, for example smashing down through the wood felt fun. Overall was a good game and I enjoyed it :)