Hi Game36:
Thank you for the suggestion and because of this, I have implemented it into my version of the build of the game. Unfortunately, I cannot update the game until after the game jam has finished, but you have made a good point with this. I assumed that most people would play the game with WASD because that is almost always how I play games. However, using the arrow keys could be more intuitive for a 2D platformer that doesn't require use of the mouse.
Thank you for the suggestion and good luck in the game jam!