Thank You! A local 2 player vs mode exists in the game, but I broke something in the code at the last minute and couldn't manage to fix it in time for the Jam's deadline so I just kept it hidden. You can access it by pressing 2 at the Title Screen, and Player 2 uses the left and right arrows to control his character. Keep in mind it bugs a lot, so you may need to reestart the fight sometimes, by pressing R.
After the Jam is completely over I plan to go back to this project and fix all these issues so everything works properly.