enPasant

Just downloaded my first game emulator (WinVICE) in order to play one of my favorite childhood games (Jumpman). I have the emulator and game up and running on my new model Dell laptop but I don't have a joystick. I'm dying to reminisce and don't have immediate access to a joystick. Can anyone give me specific instructions on switching the game from strict joystick mode to a keyboard mode? Thanks for any input you can provide. eP