Needs work.
Congrats on getting some results so far with your game.
Some crit please dont take it up bad its really jsut improvement ideas to keep in mind.
Why can I only throw one shuriken at a time, and then have to wait for it to hit a ninja to throw another one? The quicker it hits a ninja the quicker I get to throw. Doesn't make sense. This really stops the player from going up and down, since you can throw a star at the ninja way at the back at the top and then when you go down you cant defend yourself.
Some ninjas move way to fast, try and keep it realistic to the hero's moving speed.
When standing in one spot and just holding control down you can never be hurt, partly the mistake of the first error i mentioned. Also the ninjas that just fly past you. They dont chase you, but im sure this will get eliminated later with AI.
Keep it up looking good.
~Afflict.