A unique and a very interesting concept!
The presentation of this game is one of the best I have ever seen in the jam, including the art, sound design, particles and other stuff. Slashing those targets was really satisfying
My only suggestion is to add a downside or a limit to teleporting to the sword, otherwise the player could abuse that ability and literally fly through the level, making level design in later stages harder or the game in general becoming too easy. You could make it so the sword can only be teleported to if it is stuck into the ground, or you could add a cooldown for the teleport ability.
Overall an amazing entry!