This is really visually impressive, the pixel art is fantastic and I'm impressed by the variety of poses each character has. You've got the basic move set of a fighting game down well, the throw ability is a welcome addition and definitely varies up the gameplay. I love that you had an option to change your keybindings!
I think the game could benefit from some kind of visual indication that you've been hit, even if the character just flashes white or something. I also noticed if you move to far to the left or right the character will get stuck, perhaps there is a gap in your colliders.
Overall this works well as a fighting game, and the addition of keybindings, versus mode and round counters show a good amount of polish beyond the basic gameplay. Nice job!