TMK: Yes, absolutely. I use one every single time I test. I will make a note to implement customizable controls though, now that you mention it.
UNTIL THEN, however, look up a program called joy to key. (joy2key?)
Alright, so everyone knows, the new version will have a complete pause screen, and the damage system will be fully implemented!
EDIT: It has come to my attention that the original download link has died. If you really want to download it now, use this link. BE WARNED, it is being released a full week before it was intended to be, so it's probably got a number of glitches.
http://www.mediafire.com/?2yxvwdxmxld