The boss design was very clever, a large boss would have a large hitbox, making it just an alternating right and left click boss fight, but with the "real" boss you actually have to aim, move, and dodge while alternating attacks, definitely would like to see this concept expanded, the animation and the character is great, and theres some nice lasting particles with the lightning bolt, the only thing missing is some music to listen while slicing and throwing lightning at enemies, a very great job for your first game.