Quite good! Would like some audio and a health system to show how many hits you can take before you die. I also wish you can restart the game after a game over but I guess it's for the game's feel. The doors also need to indicate that they're locked and you need to increase the range of the sword attack.
Once playing the game a bit more, the sword attact is actually good since you can spam it. As for the end, I know this is for a game jam but I would like the final boss to be lock until you killed all the enemies (since it's death's task for you to do so) and I wish door you just open won't be lock in the next room.