1) Yep, ATM there's no way  to rebind keys and I have it set to arrow keys as default. I started playing on a laptop which didn't have a numpad, so I'm used to playing with only arrow keys. I also added the ability to press 2 adjacent movement keys at once for moving diagonally, which AFAIK isn't possible on SDL 1.2. I'll eventually add a keybind menu.

I'm not sure about arrow keys moving in the wrong direction. They're moving as expected on my computer. How "wrong" is the direction they're moving? Is it something like pressing "up" moves the character down/south, or is it just off by 45 degrees?

Mouse movement got broken at some point after it was working, so now it'll only move you in 1 direction. It's on my list of things to fix.

2) I think the excessively large character select buttons are a side effect of screen resolution compatibility changes I'm in the middle of. Should be fixed soon.

3) That's odd. S/X work fine for targeting for me. T talks as expected. Shift doesn't do anything yet - inventory is toggled with I or by clicking Menu > Inventory.

What keyboard layout are you using? I can't imagine there's significant difference in Unity's implementation of US vs. UK keyboards, but that's the only difference I can think of.

EDIT: Forgot to mention: Since there's no way to exit the client yet (I use the Unity editor to run the client so I haven't bothered yet) log out (Menu > Logout) and press Alt+F4.

One small detail which I expect you're aware of - when you log out, the login box re-appears and you can select the server and type in username and password, but that's as far as it goes - you can't log in a second time.

To me 7931 is intuitive because they are pointing the same way as the isometric view you are looking at. So 9 moves the character at 45° compass-wise, which is isometric North. It's identical with the directional arrows for rotating arches in Gridarta. The default keybinding should be what the majority prefer.