This one will require a different approach to normal evaluation.
To start, you can feel how the music gets out of sync with the attacks. To rectify this, you will want to learn about AnimationPlayer, as it can maintain a perfect rhythm.
Having a Godot Icon, a solid purple background, and unstylized information tells me that assets really held you back. It may be in your interest to either work with asset packs or join a team. I'll always recommend joining a team, as it allows you develop your specialty. If you plan to be a generalist, however, the solo dev path is still correct.
Do not Despair, for this is all a part of the learning process. Continue to Jam, and you will grow.