An interesting premise for using jump ropes as loops for combat, I would have preferred mapping the controls to the keyboard instead of mouse and had a more intuitive way to know which way to swing. It isn't clear why we are on an island, who these enemies are, or why we must use rhythm to beat them. Being able to connect the environment to our actions would take this game to a further level along with features like particle effects, stylized interfaces, and more feedback for the swings and hits/misses.
There is a lot here for a few days of work and hopefully you continue swinging for the full release!