A game about using yoyo's as a weapon? Original and innovative!
Throwing the yoyo feels nice, but I wish that mechanic was more developed. Simply pushing a button when near an enemy isn't very interesting or engaging. I would like more control to different throws, different throws having different effects, charging your throw, hitting projectiles to reflect them etc.... Anything that will give the player more choice.
More sounds and effects are also necessary. A sound for hitting an enemy, for when you get hit, for hitting other objects, for rewinding the yoyo, for killing an enemy etc.. More particles too! The game needs more juice.
The movement and platforming is smooth.
There are so many ways this could be better, but I absolutely love the idea. This definitely has some potential.