Gens has the Keyboard set as the input set as Default. So if you have a Pad/Joystick the first stop is to set it as Default.
Click on Options like the above Picture shows and then click Joypads
Once the Dialogue opens click on the Player 1 Option Box to choose the number of Buttons on your Pad (default is 6). Click on Redefine Keys then use your Pad/Joystick to select the Digital/Analogue Up to set it to that. It will automatically move to the next Selection: Down, Left, Right, Start, A, B, C, Mode, X, Y, and Z.
Once all are done. It will say Configuration Successful, and will ask you to Press A Key To Continue. Once you do just press the Ok Button to close the Dialog. If it has skipped past a button by mistake you can't go back to it until the whole process is completed, so in the event of this just click a button and then click on the Redefine Keys Button again. The same applies if you want to change Buttons for the Keyboard. Just click on the Button and apply it to where you want it assigned for the use of the Keyboard. Now you are ready to start using a Pad/Joystick or Keyboard how you like it in your Games. Note: Make sure you configure your Pad/Keyboard when a game isn't running to avoid Gens crashing.
