Hello Sweetie,
Regarding button remapping, the methods we used in Unity don't make this easy for us, so we're having a hard time trying to achieve this.
Regarding the attack, we tried it in other ways, and in some situations the game was too easy, so the current range and time were the ways we found to be most in line with the difficulty standard we planned as game designers.
Regarding the resolution, since we don't have equipment that can reach this resolution, we can't really say that it's working at this resolution in a way that maintains the quality of our images.
Stairs, I believe we'll be able to make this change in the next update.