Hello fellow Demon's Souls enjoyer :)
Thanks for playing the game and the verbose feedback!
The web version is not ideal, since it hangs on loading in shaders, and when the tilemaps get modified. Didn't have time to solve those issues unfortunately, but they aren't prevalent in the desktop build.
Same goes for the mouse issues. Had to change Godot versions the last minute to lessen the shaking bug, but It still didn't fix it.
The character speed and dodge need some tweaking, but since it also impacts combat heavily, it's not just a simple matter of turning it.
Thanks again for playing, and I'm glad you enjoyed it!