Great use of theme. Really reminded me of the game Titan Souls. I love the art style. The sound effects fit well. I wish it had epic boss music too. Hitting the players with rocks seemed to not kill them sometimes so ether the hit collider is not killing them sometimes when it should or they take multiple hits which isn't obvious to the player. The game is currently too easy so you should probably rapidly increase the number of players that spawn in over time. I would love to see this game expanded with other boss fights too. Great job!