Default Game Controls
I wanted to make the controller inputs as vanilla as possible. They are using the default Input Manager (Unity: Edit→Project Properties→Input Manager). The Inputs currently in use are:

Horizontal+Vertical - directional arrows on keyboard: used for character movement
A - z key: Slash attack
B - x key: Dash
C - c key: Shoot
D - v key: currently not used
ScoreBoard - tab key: show or hide the scoreboard during gameplay
EscapeMenu - esc key: bring up or hide options menu during gameplay
You can change these to whatever you want. I actually recommend changing all of this out for Unity’s new Input System which is a great deal more flexible but that’s a choice you as the developer need to make so I’ve kept all the add-ons as the default set.
Have fun!