Welcome to ninja mission 1! This might sound weird but you over-packed your scrolls and shurikens, and etc., so you can't jump. use arrow keys to move, and press the inventory to scroll through items. press space to shoot shurikens and (or) kunai!
I forget who, but thanks for the 3-D map Check Here for updates. https://scratch.mit.edu/discuss/topic/339368/?page=1#post-3428384
