The particles' glow and the skeletons look really cool!
I also like how the particles disappear after a while which makes the game very playable because that way you can't spawn a million particles and kill your fps or make the map a complete mess.
But the enemy does not move or attack you. I think more interaction with the enemy would be nice gameplay but maybe you didnt have time for that.
(Also maybe add a button to restart the game at the end so i dont have to manually restart the game)