Incredible game! Very fun and unqiue concept, quite difficult at first but you get into it after a while and begin to recognize the boss' movement and attack patterns. Was very satisfying to watch the damage done gradually ramp up as more and more copies joined the fray. I think this concept could be expanded further into a full game, I see a lot of potential of utilizing it to create different types of challenges. In particular it would be nice to give more clear ways to synergize with your past selves, I understand some of the spells can benefit other versions of you, but overall the ability to effectively coordinate felt a bit limited. Nonetheless, excellent work!