Just played and rated your game. Here's what I think:
In the beginning I had to get used to the controls but once I was done it was very funny to fly around and slice things. Also I like your approach to use some sort of confetti instead of blood.
I would suggest to add something to indicate how much health a player still has left and some more feedback to get a feeling if the player was hit or not. Sometimes I couldn't figure out if I was hit or not by these light beams. Also Sound Effects would be great :)
But overall: cool idea and fun to play. Keep on jamming!