Hey! Thanks for your feedback. I agree with you on the rate of fire, I've struggled to balance the growth per death. For the movement speed of the player, the design was deliberate to provide more control to the player to navigate tight spaces and you have to anticipate where the boss will be to fire your bullets but the current build of the game makes it boring because there's isn't much to dodge around and the growth rate is unbalanced.
Appreciate your feedback and thanks for playing!