How do I enable a gamepad/controller to work on this?
Do I have to play this all at once or is there a save system?
Have you considered a difficulty system? Maybe one where you can have health, fewer enemies etc.
What does the skull in the top corner for?
I think the death animations should make the enemies turn into dust and disappear, not just flash white and fly away...
I do like that you can slash in 4 directions, so I don't have to land on an enemy and start the level over.