My idea was for you to find out where to throw the shurikens by trial and error. Three friends of mine played and it didn't take more than 10 minutes for the game to end. Sorry if it was too difficult for you.
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yep. The strength of skuriken changes when you are standing still, when you are walking and when you are in the air. The skuriken spawns in the player's head and accelerates in the direction of the mouse.
I was going to do a more detailed tutorial but I thought it was not worth wasting time on it so I got lazy.