Glad you're enjoying the games so far!
I thought there might be a config file that could be tweaked for keybinds, but it doesn't look like it. No plans to custom code that at this point, has too much potential to break other things. I will point out though that the Japanese controls are A and Z for your confirm and cancel buttons, which is much more natural than enter and shift, buttons on the left, movement on right. All available by default, and easier than trying to mash your hands into that one part of the keyboard at least.
I did originally intend to do some mouse control with the glory hole mini-game, but it just isn't doable with the way RPGMaker and available plugins handle mouse input. Too flaky.
And no, no discord. This is the place to discuss the game, ask about bugs, share fanart etc.