@Smoku

Ideas regarding keys,joystick and mouse functions.

Keys

We have most of them already but the ones we dont have like the f1 - f10 and the alt keys etc with a press of a button/buttons (eg. shift + del) cant these missing keys show up on the screen either down the side/sides (like someone mentioned before) slightly out of the game screen so a tap on these keys registers as a tap on that particular button and not a movement / mouse press in the running game.
Also shift + return would bring up a transparent full amiga keyboard controlled by the screen or keyboard (just for nostalgia)

joystick / mouse

eg. sym/ctrl + space would select between - screen as mouse and keyboard as joystick or screen as mouse and keyboard as mouse + 3 buttons (left,right mouse press and a third button when pressed speeds up the mouse pointer)

These options when selected - an icon would flash up on screen.



Hope this gives you ideas.