I'm pretty sure you can, many people here are saying they're going to try to continue a game they've lost motivation to finish and think this is the right way to get motivation and me I'm continuing a game I started making days before the jam and thought this could help me make it better especially since this is my first game.

yeah that's fine by us! generally we want you to be trying something new or pushing yourself to do something you haven't done before (or out of your comfort zone)