Love the visual effects, especially the particles! I think where it could use some work though are on the player's abilities, namely that the particles are a bit much for the attack and the grapple only extends to half the distance between you and the light. That last bit was especially bad, because I actually really liked the grapple once I figured out how it worked, but I was confused by it for a good while.
The music you chose fits really well! It's a nice relaxing experience.
Other than that the movement is a bit slippery/slow and could use some workshopping, but I can't really say what would make it better since I do think slow movement fits better for the aesthetic you're going for.