Awesome art, music and movement. It is very polished game, I am impressed that it was made only in one week! For suggestions I have not much to say. Maybe introducing keys slowly (not showing all of them at once) to the player would be awesome, because I felt like there are too much keys to remember at once, at the beginning I was trying to fight and instead of fighting I constantly end up dashing like mad :D
Also restart animation could way faster.