I think the biggest problem with this game is the level. Not the visuals, not the theme, but the sequence of challenges presented to the player. The character have unusual movement and it takes quite some time to adapt on how he behaves, alongside with the controls. The first thing the game asks is to perform a roll jump and the punishment is too hard - make three jumps of intermediate difficulty in sequence or go back to the beginning. This was something that let me really frustrated because I wanted to "feel" the game first. Then the walljump came with a very high cost, but at least you could retry many times. After that, I got stuck in the hole in the second walljump challenge and gave up for now.
Sometimes the characters feels a bit unresponsive too. You can't rely too much on the ledge grabbing and it seems to work effectively only on hard edges. Maybe the game could benefit from having more blocky collisions areas.
It's not a bad concept. The presentation was very good and everything else raised my expectations. But it's not there yet, you could play with it more and improve.