Yeah, I agree with your nitpicks. Not quite sure how we'd deal with the "edge of screen RNG" problem, but as for the movement, we did think about letting the player move when charging up a hit, but we didn't implement it, because to be honest, our sprites didn't have the animation for it, and we ran out of time for the jam. <.<
Thanks a lot for trying out our game though! Glad you enjoyed it!