First up, thanks so much for being possibly the most awesome Spellrazor-player ever. The idea of seeing this in a cabinet is just... I'm weeping. Actually weeping manly weeps. You know when people's 'sportsball' teams win? That kind of weep.
(Sniff)
In all seriousness, I had planned to get a Mame cabinet going, so I'd actually be really interested to see your setup. You have to send me pictures.
On to your questions:
1) There are as of about 5 minutes ago. I added them just for you. When you get version 0.9.11, it'll be there waiting as 'fullscreen'. There are no other commands.
2) Esc will take you out of the game at the front end. If you're in the game, Esc takes you back to the front screen AFTER giving you an 'Are you sure' menu. I can add a Shift-ESC option to quit out wherever you are and whatever you're doing. Do you want that?
3) As for actual mappings, I'd suggest you *need* Sword, Arrow, Shield, Bouncer, Homer, Lightning, X-Ray, Warp, Teleport, Companion, Deathtouch, Energybeam, Kiss, Zap, Jump, Quake. Others are great for 'Oh, think you're tough? Have some of this...'
Obviously, the keyboard is needed for hacking...
Lemme know what else you need and I'll do my best to provide.
Thanks,
-Dene