I've tried to mark hotkeys wherever they are with an underline. M - Go to map screen L - Look for enemies A - Attack B - Buy item S - Sell item E - Equip item C - Character/stats sheet (actually just a list) D - Drop item Cheaty debug stuff: Space bar - Get a secret, special item.
It's not called RPG Test because it's a finished, polished game with lots to do and see and little in the way of bugs. This is a work in progress barely suitable for human consumption.