Just chiming in…maybe in the full release, although of course full key customization is nice/great, you could have the jk/hl/yu/bn keyset offered as a secondary option right off the bat. This is the classic Rogue movement keys set, and it's pretty easy to get used to, particularly if you use Gmail keyboard shortcuts (j and k to go up and down a list of messages) or Vim (the old keyboard-centric text editor), which both use j and k to move down and up--or if the player is familiar with this movement set from roguelikes.
In my experience, other keysets that try to emulate the numpad layout don't really work because unfortunately the letter keys on a keyboard are not lined up perfectly vertically like numberpad keys are. So muscle memory does not work. IMHO, the Rogue keyset is much easier to pick up and is more ergonomic.
(See: https://www.roguebasin.com/index.php/Preferred_Key_Controls)