I picked this up last year, but I didn't get around to playing it until now.. I would have skipped it had I known it didn't have key re-binding. Lately I don't bother if a game doesn't have key re-binding since I have plenty of other games to play.
At first I sucked it up and played with the default keys, but I couldn't stand that for long. Finally I set up AutoHotKey to remap keys, but some games can still recognize mouse clicks even after re-bind with AHK and this is one of them. Luckily I have a Logitech mouse and the Logitech software can remap mouse buttons to keys without games detecting the mouse clicks.
I'm kind of glad I didn't know this game didn'thave in-game rebinding because this is a game I'd say is worth the hassle of finding a work-around. AutoHotKey is easy to use for if all you need to do is swap some keys around, but if you need to re-map the mouse buttons, you'll have to have a mouse that has software to do it.