This is great, and definitely has the potential to be a really good platformer - I think a few easier levels at the start to help the player get used to the controls and a few slight tweaks to make it respond just a little more consistently with the wall jumps and you'd have the basis for a fantastic game.
As it is currently - still a really good game! Music is perfect, the shuriken mechanic is a whole lot of fun and the level design was full of nice, cleverly built challenges. Really enjoyed my time with this!