Trigger A Macro On Arrow Keys

I'm creating a small Excel RPG where the player moves the around a blank worksheet with the walls of a maze appearing as you approach them (think dark corridors, you can see only 1 cell in all directions around you).

The players current location is shown by excel setting the activecell to the players location. Currently I have four buttons labeled Up, Down, Left and Right which the player clicks to move in the desired direction.

The testers were frequently missing the four movement buttons and this would put the activecell outside of the maze next to one of the buttons. They'd have to move it back manually.

I would like for the players to move around using the arrow keys to use the activecell, as you would normally move around a sheet... but before each movement there is a procedure that check IF the player can move in the desired direction or not (cell borders used for walls), and then once they've moved there are more procedures to check for monsters treasure chests etc.

How can I make the arrow keys trigger the macros that the Up, Down, Left and Right buttons currently trigger, and not just move the activecell?