Thank you very much for your comment :)
I'm glad you liked the game^^ And honestly, I think my favorite is also the joker, whether it's the design, the moveset, the sound-design or the music :D
As for the little dotted line, there's a small one when you're playing with the joystick (it's more of an arrow than a real line running through the whole arena).
I didn't think it was necessary with the mouse. But for the sake of accessibility, I've just added the option in the settings to activate an aiming assist when playing with the mouse :D (The settings menu is getting a bit crowded as I keep adding options xD).