I really liked the level design, using the end point of one level to be the beginning of the next was a nice choice.
The story was simple but engaging. I liked the continual growth of the character through new abilities, I was never getting bored of the old mechanics since a new one was always being introduced to me.
I really wanted to finish your game but was stuck as soon as I unlocked the wall jump ability. I'm not sure whether it was my inability to figure out the puzzle, or if it was the controls but I couldn't figure it out. Maybe an adjustment to the level to would make it easier.
Otherwise, a very solid game.