You have made a good start for your first jam. Your game has a nice concept . However, there are some aspects that could be improved. For example, the walking of the girls is a bit stiff and unnatural. You could try to make them more fluid and expressive. Also, I didn't understand how to kill the monsters. Maybe you could add some instructions or hints to make it clearer. Overall, you have done a great job and I hope you keep making games.