I don't use that either. I would use arrow keys, but my down arrow key is broken, and I hate WASD, so I have to go with something unconventional. There's no reason not to allow the player to configure whatever keys they wish.
I've not currently got the time to implement accessibility options until I've got more data on the actual game. I appreciate you having a look and I definitely recognise its a nice to have feature that will be added later. but right now it's not my immediate focus.
