Hey, congratulations on finishing your first game jam. That's a huge milestone - a lot of people never make it that far! Gamedev can be a very stressful hobby, especially when also have family life and a full-time job to manage.
I think you have a very decent prototype for a game here. Good use of theme, too! With more elaborate level design and perhaps a few more game elements (e. g. switches/barriers and the like), this could be very interesting.
Oh, and for music and SFX, I've found FreeSound and FreeMusicArchive to be very useful. It really tends to add a lot.