Nice game, although one bug I found is that when the end screen came up showing your score and rank, the "Next Song" words where still there, and clickable. When you click it the next song appears and the choices of the song, but then the menu music is playing aswell as that + the game over screen is still there.
Good game, gets too easy in survival mode once you hit around 60 seconds. Slash kills more people than they hurt you so you stay at full health. Maybe lower the cooldown of Slash so you don't gain health to fast.
4/5