Aside from the bugs (which are quickly being fixed, thankfully!), I was hoping the devs might add some keymapping features for better customization. Any chance of that?

Love the game otherwise, except for the bugs.

The answer is: YES: http://space-bullet.com/?topic=re-bindable-keys/#post-358

Our apologies for this one taking us so long to add in. It is a rather large feature, and we want to make sure that it is bug-free before patching it in. On the bright side, this will most likely make it into our next patch, so please be patient. Thank you for your support.

Most developers rarely patch in a requested feature, even when said feature is a common one. This is a strong suit of independent developers, and you guys have already shown your strength in that area greatly. I was able to easily edit the file you specified on your official forums for the key-bindings I wanted anyway (you should mention or link that here outside of my thread), and changed my original post to reflect that.
Kudos to you guys. Thanks for your response.