A short and sweet mini-metroidvania; I like this! ^_^
My main point of critique would be that the wall-jumping felt a little unresponsive to me, and thus a little harder to pull off than I might have liked. (From what I saw, it seemed that it only activated once an animation had played, and possibly required really pressing heavily into the wall; I think that I might have found it more intuitive if both--presuming that I have them correct--were relaxed.)
Still, overall the game was rather fun, and I enjoyed it. ^_^