What I added: Yin and Yang ninja, infinte shurikens, imortality, faster enemy spawn time, Arrows white when are chaged up, rope ninjas (now pistoleers) come at score 20, arrow ninjas (now hoverboard miniguners) come at score 50 (and sometimes slow-mo), dark to bright shurikens, World Highscore, and night sky. (find all 3 constelations) Use the arrow keys or WASD to move and flip around in the air! > Jump around taking out enemies with your katana! > Press Space to throw 2 shurikens! Don't you just love the physics? I think they're super cool tbh.
Most coding was done by Will, I just did what I siad I added.