Hey pavementz,
Thanks so much for checking out my game, and the kind words! <3
It's a roguelike featuring diagonal movement, so NumPad is kinda really the optimal way to play, but you can absolutely customize keybindings to something more of your liking!
Mouse Controls, however, will unfortunately never be a thing ...
Full game will of course have a convenient menu - for now you'll have to "hack" the "customControls.ini"-file, which the game automatically creates for you on startup. It's just a textfile, and actually pretty easy and straightforward to edit: just copy the respective commands from the list next to the action you want to customize. Spaces do not matter, however, absolutely keep the order of things!
Maybe sth. like QWE ASD YXC (ZXC for non-german layouts) might work for you. Or use Arrow Keys for orthogonal movement, and sth. like QW AS for diagonal directions?
Some default keys will always work in certain occasions, like Arrow Keys, Return or ESCAPE.
Hope that was helpful! <3