Hey Lolz12347, there are some key mappings (listed in the build) but it's not optimal, editable or possibly advisable!
You can't aim weapons freely as we do with the left stick on the controller for example. We will be working on this over the coming weeks, as we appreciate most PC players are using a mouse and keyboard combo.
Also there is new build coming at the end of week - the one we're showing at Insomnia64 :)