Thank you so much for the detailed feedback! Glad to know that the experience matched our design intentions, you're describing exactly the design considerations we took into account when designing the game. I agree that the boss going offscreen is a problem; the issue is the fact that if the boss stopped or slowed down at the edge of the screen instead, that could catch the player off guard and could cause a somewhat unfair death via contact damage. We're not fully sure what the solution is yet. We're planning on creating more boss battles in the future, so stay tuned for more content!